1 GNU C Library NEWS -- history of user-visible changes.
2 Copyright (C) 1992-2018 Free Software Foundation, Inc.
3 See the end for copying conditions.
5 Please send GNU C library bug reports via <https://sourceware.org/bugzilla/>
6 using `glibc' in the "product" field.
12 * The GNU C Library can now be compiled with support for building static
13 PIE executables (See --enable-static-pie in INSTALL). These static PIE
14 exectuables are like static executables but can be loaded at any address
15 and provide additional security hardening benefits at the cost of some
16 memory and performance. When the library is built with --enable-static-pie
17 the resulting libc.a is usable with GCC 8 and above to create static PIE
18 executables using the GCC option '-static-pie'. This feature is currently
19 supported on i386, x86_64, x32 and aarch64.
21 * Optimized x86-64 asin, atan2, exp, expf, log, pow, atan, sin, cosf,
22 sinf, sincosf and tan with FMA, contributed by Arjan van de Ven and
25 * Optimized x86-64 trunc and truncf for processors with SSE4.1.
27 * Optimized generic expf, exp2f, logf, log2f, powf, sinf, cosf and sincosf.
29 * In order to support faster and safer process termination the malloc API
30 family of functions will no longer print a failure address and stack
31 backtrace after detecting heap corruption. The goal is to minimize the
32 amount of work done after corruption is detected and to avoid potential
33 security issues in continued process execution. Reducing shutdown time
34 leads to lower overall process restart latency, so there is benefit both
35 from a security and performance perspective.
37 * The abort function terminates the process immediately, without flushing
38 stdio streams. Previous glibc versions used to flush streams, resulting
39 in deadlocks and further data corruption. This change also affects
40 process aborts as the result of assertion failures.
42 * On platforms where long double has the IEEE binary128 format (aarch64,
43 alpha, mips64, s390 and sparc), the math library now implements _Float128
44 interfaces for that type, as defined by ISO/IEC TS 18661-3:2015. These
45 are the same interfaces added in version 2.26 for some platforms where
46 this format is supported but is not the format of long double.
48 * On platforms with support for _Float64x (aarch64, alpha, i386, ia64,
49 mips64, powerpc64le, s390, sparc and x86_64), the math library now
50 implements interfaces for that type, as defined by ISO/IEC TS
51 18661-3:2015. These are corresponding interfaces to those supported for
54 * The math library now implements interfaces for the _Float32, _Float64 and
55 _Float32x types, as defined by ISO/IEC TS 18661-3:2015. These are
56 corresponding interfaces to those supported for _Float128.
58 * glibc now implements the memfd_create and mlock2 functions on Linux.
60 * Support for memory protection keys was added. The <sys/mman.h> header now
61 declares the functions pkey_alloc, pkey_free, pkey_mprotect, pkey_set,
64 * The copy_file_range function was added.
66 * Optimized memcpy, mempcpy, memmove, and memset for sparc M7.
68 * The ldconfig utility now processes `include' directives using the C/POSIX
69 collation ordering. Previous glibc versions used locale-specific
70 ordering, the change might break systems that relied on that.
72 Deprecated and removed features, and other changes affecting compatibility:
74 * Support for statically linked applications which call dlopen is deprecated
75 and will be removed in a future version of glibc. Applications which call
76 dlopen need to be linked dynamically instead.
78 * Support for old programs which use internal stdio data structures and
79 functions is deprecated. This includes programs which use the C++ streams
80 provided by libstdc++ in GCC 2.95. Programs which use the internal
81 symbols _IO_adjust_wcolumn, _IO_default_doallocate, _IO_default_finish,
82 _IO_default_pbackfail, _IO_default_uflow, _IO_default_xsgetn,
83 _IO_default_xsputn, _IO_doallocbuf, _IO_do_write, _IO_file_attach,
84 _IO_file_close, _IO_file_close_it, _IO_file_doallocate, _IO_file_fopen,
85 _IO_file_init, _IO_file_jumps, _IO_fileno, _IO_file_open,
86 _IO_file_overflow, _IO_file_read, _IO_file_seek, _IO_file_seekoff,
87 _IO_file_setbuf, _IO_file_stat, _IO_file_sync, _IO_file_underflow,
88 _IO_file_write, _IO_file_xsputn, _IO_flockfile, _IO_flush_all,
89 _IO_flush_all_linebuffered, _IO_free_backup_area, _IO_free_wbackup_area,
90 _IO_init, _IO_init_marker, _IO_init_wmarker, _IO_iter_begin, _IO_iter_end,
91 _IO_iter_file, _IO_iter_next, _IO_least_wmarker, _IO_link_in,
92 _IO_list_all, _IO_list_lock, _IO_list_resetlock, _IO_list_unlock,
93 _IO_marker_delta, _IO_marker_difference, _IO_remove_marker, _IO_seekmark,
94 _IO_seekwmark, _IO_str_init_readonly, _IO_str_init_static,
95 _IO_str_overflow, _IO_str_pbackfail, _IO_str_seekoff, _IO_str_underflow,
96 _IO_switch_to_main_wget_area, _IO_switch_to_wget_mode,
97 _IO_unsave_wmarkers, _IO_wdefault_doallocate, _IO_wdefault_finish,
98 _IO_wdefault_pbackfail, _IO_wdefault_setbuf, _IO_wdefault_uflow,
99 _IO_wdefault_xsgetn, _IO_wdefault_xsputn, _IO_wdoallocbuf, _IO_wdo_write,
100 _IO_wfile_jumps, _IO_wfile_overflow, _IO_wfile_sync, _IO_wfile_underflow,
101 _IO_wfile_xsputn, _IO_wmarker_delta, or _IO_wsetb may stop working with a
102 future version of glibc. Unlike other symbol removals, these old
103 applications will not be supported using compatibility symbols.
105 * On GNU/Linux, the obsolete Linux constant PTRACE_SEIZE_DEVEL is no longer
106 defined by <sys/ptrace.h>.
108 * libm no longer supports SVID error handling (calling a user-provided
109 matherr function on error) or the _LIB_VERSION variable to control error
110 handling. (SVID error handling and the _LIB_VERSION variable still work
111 for binaries linked against older versions of the GNU C Library.) The
112 libieee.a library is no longer provided. math.h no longer defines struct
113 exception, or the macros X_TLOSS, DOMAIN, SING, OVERFLOW, UNDERFLOW,
114 TLOSS, PLOSS and HUGE.
116 * The libm functions pow10, pow10f and pow10l are no longer supported for
117 new programs. Programs should use the standard names exp10, exp10f and
118 exp10l for these functions instead.
120 * The mcontext_t type is no longer the same as struct sigcontext. On
121 platforms where it was previously the same, this changes the C++ name
122 mangling for interfaces involving this type.
124 * The add-ons mechanism for building additional packages at the same time as
125 glibc has been removed. The --enable-add-ons configure option is now
128 * The --without-fp configure option is now ignored. Whether hardware
129 floating-point instructions are used is now configured based on whether
130 the compiler used at configure time (without any options implied by a
131 --with-cpu= configure option) uses such instructions.
133 * The res_hnok, res_dnok, res_mailok and res_ownok functions now check that
134 the specified string can be parsed as a domain name.
136 * In the malloc_info output, the <heap> element may contain another <aspace>
137 element, "subheaps", which contains the number of sub-heaps.
139 * The libresolv function p_secstodate is no longer supported for new
142 * The tilepro-*-linux-gnu configuration is no longer supported.
144 * The nonstandard header files <libio.h> and <_G_config.h> are deprecated
145 and will be removed in a future release. Software that is still using
146 either header should be updated to use standard <stdio.h> interfaces
149 libio.h was originally the header for a set of supported GNU extensions,
150 but they have not been maintained as such in many years, they are now
151 standing in the way of improvements to stdio, and we don't think there are
152 any remaining external users. _G_config.h was never intended for public
153 use, but predates the bits convention.
155 Changes to build and runtime requirements:
157 * bison version 2.7 or later is required to generate code in the 'intl'
160 Security related changes:
162 CVE-2009-5064: The ldd script would sometimes run the program under
163 examination directly, without preventing code execution through the
164 dynamic linker. (The glibc project disputes that this is a security
165 vulnerability; only trusted binaries must be examined using the ldd
168 CVE-2017-15670: The glob function, when invoked with GLOB_TILDE,
169 suffered from a one-byte overflow during ~ operator processing (either
170 on the stack or the heap, depending on the length of the user name).
171 Reported by Tim Rühsen.
173 CVE-2017-15671: The glob function, when invoked with GLOB_TILDE,
174 would sometimes fail to free memory allocated during ~ operator
175 processing, leading to a memory leak and, potentially, to a denial
178 CVE-2017-15804: The glob function, when invoked with GLOB_TILDE and
179 without GLOB_NOESCAPE, could write past the end of a buffer while
180 unescaping user names. Reported by Tim Rühsen.
182 CVE-2017-17426: The malloc function, when called with an object size near
183 the value SIZE_MAX, would return a pointer to a buffer which is too small,
184 instead of NULL. This was a regression introduced with the new malloc
185 thread cache in glibc 2.26. Reported by Iain Buclaw.
187 CVE-2017-1000408: Incorrect array size computation in _dl_init_paths leads
188 to the allocation of too much memory. (This is not a security bug per se,
189 it is mentioned here only because of the CVE assignment.) Reported by
192 CVE-2017-1000409: Buffer overflow in _dl_init_paths due to miscomputation
193 of the number of search path components. (This is not a security
194 vulnerability per se because no trust boundary is crossed if the fix for
195 CVE-2017-1000366 has been applied, but it is mentioned here only because
196 of the CVE assignment.) Reported by Qualys.
198 CVE-2017-16997: Incorrect handling of RPATH or RUNPATH containing $ORIGIN
199 for AT_SECURE or SUID binaries could be used to load libraries from the
202 The following bugs are resolved with this release:
204 [The release manager will add the list generated by
205 scripts/list-fixed-bugs.py just before the release.]
212 * A per-thread cache has been added to malloc. Access to the cache requires
213 no locks and therefore significantly accelerates the fast path to allocate
214 and free small amounts of memory. Refilling an empty cache requires locking
215 the underlying arena. Performance measurements show significant gains in a
216 wide variety of user workloads. Workloads were captured using a special
217 instrumented malloc and analyzed with a malloc simulator. Contributed by
218 DJ Delorie with the help of Florian Weimer, and Carlos O'Donell.
220 * Unicode 10.0.0 Support: Character encoding, character type info, and
221 transliteration tables are all updated to Unicode 10.0.0, using
222 generator scripts contributed by Mike FABIAN (Red Hat).
223 These updates cause user visible changes, especially the changes in
224 wcwidth for many emoji characters cause problems when emoji sequences
225 are rendered with pango, see for example:
226 https://bugzilla.gnome.org/show_bug.cgi?id=780669#c5
228 * Collation of Hungarian has been overhauled and is now consistent with "The
229 Rules of Hungarian Orthography, 12th edition" (Bug 18934). Contributed by
232 * Improvements to the DNS stub resolver, contributed by Florian Weimer:
234 - The GNU C Library will now detect when /etc/resolv.conf has been
235 modified and reload the changed configuration. The new resolver option
236 “no-reload” (RES_NORELOAD) disables this behavior.
238 - The GNU C Library now supports an arbitrary number of search domains
239 (configured using the “search” directive in /etc/resolv.conf);
240 previously, there was a hard limit of six domains. For backward
241 compatibility, applications that directly modify the ‘_res’ global
242 object are still limited to six search domains.
244 - When the “rotate” (RES_ROTATE) resolver option is active, the GNU C
245 Library will now randomly pick a name server from the configuration as a
246 starting point. (Previously, the second name server was always used.)
248 * The tunables feature is now enabled by default. This allows users to tweak
249 behavior of the GNU C Library using the GLIBC_TUNABLES environment variable.
251 * New function reallocarray, which resizes an allocated block (like realloc)
252 to the product of two sizes, with a guaranteed clean failure upon integer
253 overflow in the multiplication. Originally from OpenBSD, contributed by
254 Dennis Wölfing and Rüdiger Sonderfeld.
256 * New wrappers for the Linux-specific system calls preadv2 and pwritev2.
257 These are extended versions of preadv and pwritev, respectively, taking an
258 additional flags argument. The set of supported flags depends on the
259 running kernel; full support currently requires kernel 4.7 or later.
261 * posix_spawnattr_setflags now supports the flag POSIX_SPAWN_SETSID, to
262 create a new session ID for the spawned process. This feature is
263 scheduled to be added to the next major revision of POSIX; for the time
264 being, it is available under _GNU_SOURCE.
266 * errno.h is now safe to use from C-preprocessed assembly language on all
267 supported operating systems. In this context, it will only define the
268 Exxxx constants, as preprocessor macros expanding to integer literals.
270 * On ia64, powerpc64le, x86-32, and x86-64, the math library now implements
271 128-bit floating point as defined by ISO/IEC/IEEE 60559:2011 (IEEE
272 754-2008) and ISO/IEC TS 18661-3:2015. Contributed by Paul E. Murphy,
273 Gabriel F. T. Gomes, Tulio Magno Quites Machado Filho, and Joseph Myers.
275 To compile programs that use this feature, the compiler must support
276 128-bit floating point with the type name _Float128 (as defined by TS
277 18661-3) or __float128 (the nonstandard name used by GCC for C++, and for
278 C prior to version 7). _GNU_SOURCE or __STDC_WANT_IEC_60559_TYPES_EXT__
279 must be defined to make the new interfaces visible.
281 The new functions and macros correspond to those present for other
282 floating-point types (except for a few obsolescent interfaces not
283 supported for the new type), with F128 or f128 suffixes; for example,
284 strtof128, HUGE_VAL_F128 and cosf128. Following TS 18661-3, there are no
285 printf or scanf formats for the new type; the strfromf128 and strtof128
286 interfaces should be used instead.
288 Deprecated and removed features, and other changes affecting compatibility:
290 * The synchronization that pthread_spin_unlock performs has been changed to
291 now be equivalent to a C11 atomic store with release memory order to the
292 spin lock's memory location. Previously, several (but not all)
293 architectures used stronger synchronization (e.g., containing what is
294 often called a full barrier). This change can improve performance, but
295 may affect odd fringe uses of spin locks that depend on the previous
296 behavior (e.g., using spin locks as atomic variables to try to implement
297 Dekker's mutual exclusion algorithm).
299 * The port to Native Client running on ARMv7-A (--host=arm-nacl) has been
302 * Sun RPC is deprecated. The rpcgen program, librpcsvc, and Sun RPC headers
303 will only be built and installed when the GNU C Library is configured with
304 --enable-obsolete-rpc. This allows alternative RPC implementations, such
305 as TIRPC or rpcsvc-proto, to be used.
307 * The NIS(+) name service modules, libnss_nis, libnss_nisplus, and
308 libnss_compat, are deprecated, and will not be built or installed by
311 The NIS(+) support library, libnsl, is also deprecated. By default, a
312 compatibility shared library will be built and installed, but not headers
313 or development libraries. Only a few NIS-related programs require this
314 library. (In particular, the GNU C Library has never required programs
315 that use 'gethostbyname' to be linked with libnsl.)
317 Replacement implementations based on TIRPC, which additionally support
318 IPv6, are available from <https://github.com/thkukuk/>. The configure
319 option --enable-obsolete-nsl will cause libnsl's headers, and the NIS(+)
320 name service modules, to be built and installed.
322 * The DNS stub resolver no longer performs EDNS fallback. If EDNS or DNSSEC
323 support is enabled, the configured recursive resolver must support EDNS.
324 (Responding to EDNS-enabled queries with responses which are not
325 EDNS-enabled is fine, but FORMERR responses are not.)
327 * res_mkquery and res_nmkquery no longer support the IQUERY opcode. DNS
328 servers have not supported this opcode for a long time.
330 * The _res_opcodes variable has been removed from libresolv. It had been
331 exported by accident.
333 * <string.h> no longer includes inline versions of any string functions,
334 as this kind of optimization is better done by the compiler. The macros
335 __USE_STRING_INLINES and __NO_STRING_INLINES no longer have any effect.
337 * The nonstandard header <xlocale.h> has been removed. Most programs should
338 use <locale.h> instead. If you have a specific need for the definition of
339 locale_t with no other declarations, please contact
340 libc-alpha@sourceware.org and explain.
342 * The obsolete header <sys/ultrasound.h> has been removed.
344 * The obsolete signal constant SIGUNUSED is no longer defined by <signal.h>.
346 * The obsolete function cfree has been removed. Applications should use
349 * The stack_t type no longer has the name struct sigaltstack. This changes
350 the C++ name mangling for interfaces involving this type.
352 * The ucontext_t type no longer has the name struct ucontext. This changes
353 the C++ name mangling for interfaces involving this type.
355 * On M68k GNU/Linux and MIPS GNU/Linux, the fpregset_t type no longer has
356 the name struct fpregset. On Nios II GNU/Linux, the mcontext_t type no
357 longer has the name struct mcontext. On SPARC GNU/Linux, the struct
358 mc_fq, struct rwindow, struct fpq and struct fq types are no longer
359 defined in sys/ucontext.h, the mc_fpu_t type no longer has the name struct
360 mc_fpu, the gwindows_t type no longer has the name struct gwindows and the
361 fpregset_t type no longer has the name struct fpu. This changes the C++
362 name mangling for interfaces involving those types.
364 * On S/390 GNU/Linux, the constants defined by <sys/ptrace.h> have been
365 synced with the kernel:
367 - PTRACE_GETREGS, PTRACE_SETREGS, PTRACE_GETFPREGS and PTRACE_SETFPREGS
368 are not supported on this architecture and have been removed.
370 - PTRACE_SINGLEBLOCK, PTRACE_SECCOMP_GET_FILTER, PTRACE_PEEKUSR_AREA,
371 PTRACE_POKEUSR_AREA, PTRACE_GET_LAST_BREAK, PTRACE_ENABLE_TE,
372 PTRACE_DISABLE_TE and PTRACE_TE_ABORT_RAND have been added.
374 Programs that assume the GET/SETREGS ptrace requests are universally
375 available will now fail to build, instead of malfunctioning at runtime.
377 Changes to build and runtime requirements:
379 * Linux kernel 3.2 or later is required at runtime, on all architectures
380 supported by that kernel. (This is a change from version 2.25 only for
383 * GNU Binutils 2.25 or later is now required to build the GNU C Library.
385 * On most architectures, GCC 4.9 or later is required to build the GNU C
386 Library. On powerpc64le, GCC 6.2 or later is required.
388 Older GCC versions and non-GNU compilers are still supported when
389 compiling programs that use the GNU C Library. (We do not know exactly
390 how old, and some GNU extensions to C may be _de facto_ required. If you
391 are interested in helping us make this statement less vague, please
392 contact libc-alpha@sourceware.org.)
394 Security related changes:
396 * The DNS stub resolver limits the advertised UDP buffer size to 1200 bytes,
397 to avoid fragmentation-based spoofing attacks (CVE-2017-12132).
399 * LD_LIBRARY_PATH is now ignored in binaries running in privileged AT_SECURE
400 mode to guard against local privilege escalation attacks (CVE-2017-1000366).
402 * Avoid printing a backtrace from the __stack_chk_fail function since it is
403 called on a corrupt stack and a backtrace is unreliable on a corrupt stack
406 * A use-after-free vulnerability in clntudp_call in the Sun RPC system has been
407 fixed (CVE-2017-12133).
409 The following bugs are resolved with this release:
411 [984] network: Respond to changed resolv.conf in gethostbyname
412 [5010] network: sunrpc service cleanup causes unwanted port mapper traffic
413 [12068] localedata: sc_IT: misspelled yesexpr/day/abday/mon/abmon/date_fmt
415 [12189] libc: __stack_chk_fail should not attempt a backtrace
417 [14096] time: Race condition on timezone/tst-timezone.out
418 [14172] localedata: az_IR: new locale
419 [14995] build: glibc fails to build if gold is the default linker, even if
421 [15998] build: [powerpc] Set arch_minimum_kernel for powerpc LE
422 [16637] network: inet_pton function is accepting IPv6 with bad format
423 [16640] string: string/strtok.c: undefined behaviour inconsistent between
424 x86 and other generic code
425 [16875] localedata: ko_KR: fix lang_name
426 [17225] localedata: ar_SY: localized month names for May and June are
428 [17297] localedata: da_DK: wrong date_fmt string
429 [18907] stdio: Incorrect order of __wur __THROW in <printf.h>
430 [18934] localedata: hu_HU: collate: fix multiple bugs and add tests
431 [18988] nptl: pthread wastes memory with mlockall(MCL_FUTURE)
432 [19066] localedata: ar_SA abbreviated day and month names are in English
433 [19569] network: resolv: Support an arbitrary number of search domains
434 [19570] network: Implement random DNS server selection in the stub
436 [19838] locale: localedef fails on PA-RISC
437 [19919] localedata: iso14651_t1_common: Correct the Malayalam sorting
438 order of 0D36 and 0D37
439 [19922] localedata: iso14651_t1_common: Define collation for Malayalam
441 [20098] libc: FAIL: debug/backtrace-tst on hppa
442 [20257] network: sunrpc: clntudp_call does not enforce timeout when
444 [20275] localedata: locale day/abday/mon/abmon should not have trailing
446 [20313] localedata: Update locale data to Unicode 9.0
447 [20424] manual: Document how to provide a malloc replacement
448 [20496] localedata: agr_PE: new language locale Awajún / Aguaruna (agr)
450 [20686] locale: Add el_GR@euro to SUPPORTED.
451 [20831] dynamic-link: _dl_map_segments does not test for __mprotect
452 failures consistently
453 [21015] dynamic-link: Document and fix --enable-bind-now
454 [21016] nptl: pthread_cond support is broken on hppa
455 [21029] libc: glibc-2.23 (and later) fails to compile with -fno-omit-
456 frame-pointer on i386
457 [21049] libc: segfault in longjmp_chk() due to clobbered processor
459 [21075] libc: unused assigment to %g4 in sparc/sparc{64,32}/clone.S
460 [21088] libc: Build fails with --enable-static-nss
461 [21094] math: cosf(1.57079697) has 3 ulp error on targets where the
462 generic c code is used
463 [21109] libc: Tunables broken on big-endian
464 [21112] math: powf has large ulp errors with base close to 1 and exponent
466 [21115] network: sunrpc: Use-after-free in error path in clntudp_call
468 [21120] malloc: glibc malloc is incompatible with GCC 7
469 [21130] math: Incorrect return from y0l (-inf) and y1l (-inf) when linking
471 [21134] math: Exception (divide by zero) not set for y0/y1 (0.0) and y0/y1
472 (-0.0) when linking with -lieee
473 [21171] math: log10, log2 and lgamma return incorrect results
474 [21179] libc: handle R_SPARC_DISP64 and R_SPARC_REGISTER relocs
475 [21182] libc: __memchr_sse2: regression in glibc-2.25 on i686
476 [21207] localedata: ce_RU: update weekdays from CLDR
477 [21209] dynamic-link: LD_HWCAP_MASK read in setuid binaries
478 [21217] localedata: Update months from CLDR-31
479 [21232] libc: miss posix_fadvise64 on MIPS64 when static linking
480 [21243] libc: support_delete_temp_file should issue warning for failed
482 [21244] libc: support resolv_test_start() socket fd close should be
484 [21253] libc: localedef randomly segfaults when using -fstack-check due to
485 new posix_spawn implementation
486 [21258] dynamic-link: Branch predication in _dl_runtime_resolve_avx512_opt
487 leads to lower CPU frequency
488 [21259] libc: [alpha] termios.h missing IXANY for POSIX
489 [21261] libc: [sparc64] bits/setjmp.h namespace
490 [21267] network: [mips] bits/socket.h IOC* namespace
491 [21268] libc: [alpha] termios.h NL2, NL3 namespace
492 [21270] libc: mmap64 silently truncates large offset values
493 [21275] libc: posix_spawn always crashes on ia64 now
494 [21277] libc: [alpha] termios.h missing IUCLC for UNIX98 and older
495 [21280] math: [powerpc] logbl for POWER7 return incorrect results
496 [21289] libc: Incorrect declaration for 32-bit platforms with
497 _FILE_OFFSET_BITS=64 causes build error
498 [21295] network: GETAI(AF_UNSPEC) drops IPv6 addresses if nss module does
499 not support gethostbyname4_r
500 [21298] nptl: rwlock can deadlock on frequent reader/writer phase
502 [21338] malloc: mallopt M_ARENA_MAX doesn't set the maximum number of
504 [21340] libc: Support POSIX_SPAWN_SETSID
505 [21357] libc: unwind-dw2-fde deadlock when using AddressSanitizer
506 [21359] network: ns_name_pack needs additional byte in destination buffer
507 [21361] network: resolv: Reduce advertised EDNS0 buffer size to guard
508 against fragmentation attacks (CVE-2017-12132)
509 [21369] network: resolv: Remove EDNS fallback
510 [21371] libc: Missing timespec definition when compiled with _XOPEN_SOURCE
512 [21386] nptl: Assertion in fork for distinct parent PID is incorrect
513 [21391] dynamic-link: x86: Set dl_platform and dl_hwcap from CPU features
514 [21393] stdio: Missing dup3 error check in freopen, freopen64
515 [21396] libc: Use AVX2 memcpy/memset on Skylake server
516 [21399] localedata: Bad description for U00EC in
517 localedata/charmaps/CP1254
518 [21411] malloc: realloc documentation error
519 [21426] network: sys/socket.h uio.h namespace
520 [21428] libc: [aarch64] tst-backtrace5 testsuite failure
521 [21445] libc: signal.h bsd_signal namespace
522 [21455] network: Network headers stdint.h namespace
523 [21474] network: resolv: res_init does not use RES_DFLRETRY (2) but 4 for
525 [21475] network: resolv: Overlong search path is truncated mid-label
526 [21511] libc: sigstack namespace
527 [21512] libc: clone() ends up calling exit_group() through _exit() wrapper
528 [21514] libc: sysdeps/unix/sysv/linux/sys/syscall.h:31:27: fatal error:
529 bits/syscall.h: No such file or directory
530 [21517] libc: struct sigaltstack namespace
531 [21528] dynamic-link: Duplicated minimal strtoul implementations in ld.so
532 [21533] localedata: Update locale data to Unicode 10.0
534 ../sysdeps/unix/sysv/linux/s390/s390-32/__makecontext_ret.S:44: Error:
535 junk at end of line, first unrecognized character is `@'
536 [21538] libc: SIG_HOLD missing for XPG4
537 [21539] libc: S390: Mismatch between kernel and glibc ptrace.h with
538 request 12: PTRACE_SINGLEBLOCK vs PTRACE_GETREGS.
539 [21542] libc: Use conservative default for sysconf (_SC_NPROCESSORS_ONLN)
540 [21543] libc: sigevent namespace
541 [21548] libc: [mips] get/set/make/swap context for MIPS O32 assume wrong
542 size for general purpose registers in mcontext_t structure
543 [21550] libc: sigwait namespace
544 [21552] libc: XPG4 bsd_signal namespace
545 [21554] libc: sigpause namespace
546 [21560] libc: sys/wait.h signal.h namespace
547 [21561] libc: waitid namespace
548 [21573] nptl: GCC 7: /usr/bin/install: cannot remove
549 '/usr/include/stdlib.h': Permission denied
550 [21575] libc: sys/wait.h missing struct rusage definition
551 [21584] libc: sigaltstack etc namespace
552 [21597] libc: siginterrupt namespace
553 [21607] math: hppa: FAIL: math/test-tgmath
554 [21609] dynamic-link: Incomplete workaround for GCC __tls_get_addr ABI
556 [21622] libc: [tile] missing SA_* for POSIX.1:2008
557 [21624] dynamic-link: ld.so: Unsafe alloca allows local attackers to alias
558 stack and heap (CVE-2017-1000366)
559 [21625] libc: wait3 namespace
560 [21654] nss: Incorrect pointer alignment in NSS group merge result
562 [21657] network: Parse interface zone id for node-local multicast
563 [21662] string: memcmp-avx2-movbe.S lacks saturating subtraction for
565 [21666] libc: .symver is used on common symbol
566 [21668] network: resolv: res_init cross-thread broadcast introduces race
568 [21687] math: tgmath.h totalorder, totalordermag return type
569 [21694] locale: Current Glibc Locale Does Not Support Tok-Pisin and Fiji
571 [21696] libc: Incorrect assumption of of __cpu_mask in
572 posix/sched_cpucount.c
573 [21697] libc: sysdeps/posix/spawni.c: 2 * suspicious condition ?
574 [21706] localedata: yesstr and nostr are missing for Breton [LC_MESSAGES]
576 [21707] math: ppc64le: Invalid IFUNC resolver from libgcc calls getauxval,
577 leading to relocation crash
578 [21709] libc: resolv_conf.c:552: update_from_conf: Assertion
579 `resolv_conf_matches (resp, conf)' failed.
580 [21710] localedata: Added Samoan language locale for Samoa
581 [21711] localedata: Pashto yesstr/nostr locale are missing
582 [21715] nptl: sysdeps/nptl/bits/pthreadtypes.h: typedef guard
583 __have_pthread_attr_t can cause redefinition of typedef ‘pthread_attr_t’
584 [21721] localedata: Incorrect Full Weekday names for ks_IN@devanagari
585 [21723] localedata: yesstr/nostr missing for Chinese language locale
586 [21724] localedata: yesstr and nostr are missing for Xhosa [LC_MESSAGES]
588 [21727] localedata: yesstr and nostr are missing for Tsonga [LC_MESSAGES]
590 [21728] localedata: New Locale for Tongan language
591 [21729] localedata: incorrect LC_NAME fields for hi_IN
592 [21733] localedata: yesstr and nostr are missing for zh_HK
593 [21734] localedata: Missing yesstr and nostr are for kw_GB
594 [21738] libc: misc/tst-preadvwritev2 and misc/tst-preadvwritev64v2 fail
595 [21741] libc: Undefined __memmove_chk_XXX and __memset_chk_XXX in libc.a
596 [21742] libc: _dl_num_cache_relocations is undefined in libc.a
597 [21743] localedata: ks_IN@devanagari: abday strings mismatch the day
599 [21744] libc: Tests failing on --enable-tunables --enable-stack-
601 [21749] localedata: Wrong abbreviated day name (“abday”) for
603 [21756] localedata: missing yesstr, nostr for nds_DE and nds_NL
604 [21757] localedata: missing yesstr, nostr for pap_AW and pap_CW
605 [21759] localedata: missing yesstr and nostr for Tigrinya
606 [21760] localedata: Fix LC_MESSAGES and LC_ADDRESS for anp_IN
607 [21766] localedata: Wrong LC_MESSAGES for om_ET Locale
608 [21767] localedata: Missing Bislama locales
609 [21768] localedata: Missing yesstr and nostr for aa_ET
610 [21770] localedata: Missing Field in li_NL
611 [21778] nptl: Robust mutex may deadlock
612 [21779] libc: MicroBlaze segfaults when loading libpthread
613 [21783] localedata: Fix int_select international_call_prefixes
614 [21784] localedata: Inconsistency in country_isbn
615 [21788] localedata: Missing Country Postal Abbreviations
616 [21794] localedata: Added-country_isbn-for-Italy
617 [21795] localedata: Add/Fix country_isbn for France
618 [21796] localedata: Added country_isbn for Republic of Korea
619 [21797] localedata: Fix inconsistency in country_isbn and missing prefixes
620 [21799] localedata: Added int_select international_call_prefixes
621 [21801] localedata: Added int_select international_call_prefixes
622 [21804] nptl: Double semicolon in thread-shared-types.h
623 [21807] localedata: LC_ADDRESS fix for pap_CW
624 [21808] localedata: Fix LC_ADDRESS for pap_AW
625 [21821] localedata: Added country_name in mai_IN
626 [21822] localedata: Fix LC_TIME for mai_IN
627 [21823] localedata: missing yesstr, nostr for sa_IN
628 [21825] localedata: Fix name_mrs for mag_IN
629 [21828] localedata: 2.26 changelog should mention user visible changes
631 [21835] localedata: Added Maithili language locale for Nepal
632 [21838] localedata: Removed redundant data for the_NP
633 [21839] localedata: Fix LC_MONETARY for ta_LK
634 [21844] localedata: Fix Latin characters and Months Sequence.
635 [21848] localedata: Fix mai_NP Title Name
640 * The feature test macro __STDC_WANT_LIB_EXT2__, from ISO/IEC TR
641 24731-2:2010, is supported to enable declarations of functions from that
642 TR. Note that not all functions from that TR are supported by the GNU C
645 * The feature test macro __STDC_WANT_IEC_60559_BFP_EXT__, from ISO/IEC TS
646 18661-1:2014, is supported to enable declarations of functions and macros
647 from that TS. Note that not all features from that TS are supported by
650 * The feature test macro __STDC_WANT_IEC_60559_FUNCS_EXT__, from ISO/IEC TS
651 18661-4:2015, is supported to enable declarations of functions and macros
652 from that TS. Note that most features from that TS are not supported by
655 * The nonstandard feature selection macros _REENTRANT and _THREAD_SAFE are
656 now treated as compatibility synonyms for _POSIX_C_SOURCE=199506L.
657 Since the GNU C Library defaults to a much newer revision of POSIX, this
658 will only affect programs that specifically request an old conformance
659 mode. For instance, a program compiled with -std=c89 -D_REENTRANT will
660 see a change in the visible declarations, but a program compiled with
661 just -D_REENTRANT, or -std=c99 -D_POSIX_C_SOURCE=200809L -D_REENTRANT,
664 Some C libraries once required _REENTRANT and/or _THREAD_SAFE to be
665 defined by all multithreaded code, but glibc has not required this for
668 * The inclusion of <sys/sysmacros.h> by <sys/types.h> is deprecated. This
669 means that in a future release, the macros “major”, “minor”, and “makedev”
670 will only be available from <sys/sysmacros.h>.
672 These macros are not part of POSIX nor XSI, and their names frequently
673 collide with user code; see for instance glibc bug 19239 and Red Hat bug
674 130601. <stdlib.h> includes <sys/types.h> under _GNU_SOURCE, and C++ code
675 presently cannot avoid being compiled under _GNU_SOURCE, exacerbating the
678 * New <fenv.h> features from TS 18661-1:2014 are added to libm: the
679 fesetexcept, fetestexceptflag, fegetmode and fesetmode functions, the
680 femode_t type and the FE_DFL_MODE and FE_SNANS_ALWAYS_SIGNAL macros.
682 * Integer width macros from TS 18661-1:2014 are added to <limits.h>:
683 CHAR_WIDTH, SCHAR_WIDTH, UCHAR_WIDTH, SHRT_WIDTH, USHRT_WIDTH, INT_WIDTH,
684 UINT_WIDTH, LONG_WIDTH, ULONG_WIDTH, LLONG_WIDTH, ULLONG_WIDTH; and to
685 <stdint.h>: INT8_WIDTH, UINT8_WIDTH, INT16_WIDTH, UINT16_WIDTH,
686 INT32_WIDTH, UINT32_WIDTH, INT64_WIDTH, UINT64_WIDTH, INT_LEAST8_WIDTH,
687 UINT_LEAST8_WIDTH, INT_LEAST16_WIDTH, UINT_LEAST16_WIDTH,
688 INT_LEAST32_WIDTH, UINT_LEAST32_WIDTH, INT_LEAST64_WIDTH,
689 UINT_LEAST64_WIDTH, INT_FAST8_WIDTH, UINT_FAST8_WIDTH, INT_FAST16_WIDTH,
690 UINT_FAST16_WIDTH, INT_FAST32_WIDTH, UINT_FAST32_WIDTH, INT_FAST64_WIDTH,
691 UINT_FAST64_WIDTH, INTPTR_WIDTH, UINTPTR_WIDTH, INTMAX_WIDTH,
692 UINTMAX_WIDTH, PTRDIFF_WIDTH, SIG_ATOMIC_WIDTH, SIZE_WIDTH, WCHAR_WIDTH,
695 * New <math.h> features are added from TS 18661-1:2014:
697 - Signaling NaN macros: SNANF, SNAN, SNANL.
699 - Nearest integer functions: roundeven, roundevenf, roundevenl, fromfp,
700 fromfpf, fromfpl, ufromfp, ufromfpf, ufromfpl, fromfpx, fromfpxf,
701 fromfpxl, ufromfpx, ufromfpxf, ufromfpxl.
703 - llogb functions: the llogb, llogbf and llogbl functions, and the
704 FP_LLOGB0 and FP_LLOGBNAN macros.
706 - Max-min magnitude functions: fmaxmag, fmaxmagf, fmaxmagl, fminmag,
709 - Comparison macros: iseqsig.
711 - Classification macros: iscanonical, issubnormal, iszero.
713 - Total order functions: totalorder, totalorderf, totalorderl,
714 totalordermag, totalordermagf, totalordermagl.
716 - Canonicalize functions: canonicalize, canonicalizef, canonicalizel.
718 - NaN functions: getpayload, getpayloadf, getpayloadl, setpayload,
719 setpayloadf, setpayloadl, setpayloadsig, setpayloadsigf, setpayloadsigl.
721 * The functions strfromd, strfromf, and strfroml, from ISO/IEC TS 18661-1:2014,
722 are added to libc. They convert a floating-point number into string.
724 * Most of glibc can now be built with the stack smashing protector enabled.
725 It is recommended to build glibc with --enable-stack-protector=strong.
726 Implemented by Nick Alcock (Oracle).
728 * The function explicit_bzero, from OpenBSD, has been added to libc. It is
729 intended to be used instead of memset() to erase sensitive data after use;
730 the compiler will not optimize out calls to explicit_bzero even if they
731 are "unnecessary" (in the sense that no _correct_ program can observe the
732 effects of the memory clear).
734 * On ColdFire, MicroBlaze, Nios II and SH3, the float_t type is now defined
735 to float instead of double. This does not affect the ABI of any libraries
736 that are part of the GNU C Library, but may affect the ABI of other
737 libraries that use this type in their interfaces.
739 * On x86_64, when compiling with -mfpmath=387 or -mfpmath=sse+387, the
740 float_t and double_t types are now defined to long double instead of float
741 and double. These options are not the default, and this does not affect
742 the ABI of any libraries that are part of the GNU C Library, but it may
743 affect the ABI of other libraries that use this type in their interfaces,
744 if they are compiled or used with those options.
746 * The getentropy and getrandom functions, and the <sys/random.h> header file
749 * The buffer size for byte-oriented stdio streams is now limited to 8192
750 bytes by default. Previously, on Linux, the default buffer size on most
751 file systems was 4096 bytes (and thus remains unchanged), except on
752 network file systems, where the buffer size was unpredictable and could be
753 as large as several megabytes.
755 * The <sys/quota.h> header now includes the <linux/quota.h> header. Support
756 for the Linux quota interface which predates kernel version 2.4.22 has
759 * The malloc_get_state and malloc_set_state functions have been removed.
760 Already-existing binaries that dynamically link to these functions will
761 get a hidden implementation in which malloc_get_state is a stub. As far
762 as we know, these functions are used only by GNU Emacs and this change
763 will not adversely affect already-built Emacs executables. Any undumped
764 Emacs executables, which normally exist only during an Emacs build, should
765 be rebuilt by re-running “./configure; make” in the Emacs build tree.
767 * The “ip6-dotint” and “no-ip6-dotint” resolver options, and the
768 corresponding RES_NOIP6DOTINT flag from <resolv.h> have been removed.
769 “no-ip6-dotint” had already been the default, and support for the
770 “ip6-dotint” option was removed from the Internet in 2006.
772 * The "ip6-bytestring" resolver option and the corresponding RES_USEBSTRING
773 flag from <resolv.h> have been removed. The option relied on a
774 backwards-incompatible DNS extension which was never deployed on the
777 * The flags RES_AAONLY, RES_PRIMARY, RES_NOCHECKNAME, RES_KEEPTSIG,
778 RES_BLAST defined in the <resolv.h> header file have been deprecated.
779 They were already unimplemented.
781 * The "inet6" option in /etc/resolv.conf and the RES_USE_INET6 flag for
782 _res.flags are deprecated. The flag was standardized in RFC 2133, but
783 removed again from the IETF name lookup interface specification in RFC
784 2553. Applications should use getaddrinfo instead.
786 * DNSSEC-related declarations and definitions have been removed from the
787 <arpa/nameser.h> header file, and libresolv will no longer attempt to
788 decode the data part of DNSSEC record types. Previous versions of glibc
789 only implemented minimal support for the previous version of DNSSEC, which
790 is incompatible with the currently deployed version.
792 * The resource record type classification macros ns_t_qt_p, ns_t_mrr_p,
793 ns_t_rr_p, ns_t_udp_p, ns_t_xfr_p have been removed from the
794 <arpa/nameser.h> header file because the distinction between RR types and
795 meta-RR types is not officially standardized, subject to revision, and
796 thus not suitable for encoding in a macro.
798 * The types res_sendhookact, res_send_qhook, re_send_rhook, and the qhook
799 and rhook members of the res_state type in <resolv.h> have been removed.
800 The glibc stub resolver did not support these hooks, but the header file
801 did not reflect that.
803 * For multi-arch support it is recommended to use a GCC which has
804 been built with support for GNU indirect functions. This ensures
805 that correct debugging information is generated for functions
806 selected by IFUNC resolvers. This support can either be enabled by
807 configuring GCC with '--enable-gnu-indirect-function', or by
808 enabling it by default by setting 'default_gnu_indirect_function'
809 variable for a particular architecture in the GCC source file
812 * GDB pretty printers have been added for mutex and condition variable
813 structures in POSIX Threads. When installed and loaded in gdb these pretty
814 printers show various pthread variables in human-readable form when read
815 using the 'print' or 'display' commands in gdb.
817 * Tunables feature added to allow tweaking of the runtime for an application
818 program. This feature can be enabled with the '--enable-tunables' configure
819 flag. The GNU C Library manual has details on usage and README.tunables has
820 instructions on adding new tunables to the library.
822 * A new version of condition variables functions have been implemented in
823 the NPTL implementation of POSIX Threads to provide stronger ordering
826 * A new version of pthread_rwlock functions have been implemented to use a more
827 scalable algorithm primarily through not using a critical section anymore to
830 Security related changes:
832 * On ARM EABI (32-bit), generating a backtrace for execution contexts which
833 have been created with makecontext could fail to terminate due to a
834 missing .cantunwind annotation. This has been observed to lead to a hang
835 (denial of service) in some Go applications compiled with gccgo. Reported
836 by Andreas Schwab. (CVE-2016-6323)
838 * The DNS stub resolver functions would crash due to a NULL pointer
839 dereference when processing a query with a valid DNS question type which
840 was used internally in the implementation. The stub resolver now uses a
841 question type which is outside the range of valid question type values.
844 The following bugs are resolved with this release:
846 [4099] stdio: Overly agressive caching by stream i/o functions.
847 [7065] build: Support building glibc with -fstack-protector or -fstack-
849 [9842] localedata: en_CA: incorrect date format
850 [13165] nptl: pthread_cond_wait() can consume a signal that was sent
851 before it started waiting
852 [14139] manual: Do not hardcode platform names in manual/libm-err-tab.pl
853 [15765] nptl: sem_open is wrongly a cancellation point
854 [16421] network: IN6_IS_ADDR_UNSPECIFIED can use undefined s6_addr32
855 [16458] libc: endian.h and netinet/in.h byte order macros return values of
857 [16628] dynamic-link: Segfault after a binary without pthread dlopen()s a
858 library linked with pthread
859 [16630] nptl: Use SYSENTER for pthread_cond_broadcast/signal() (i.e. fix
861 [16907] libc: <argp.h> compiled with --std=cXX disables __attribute__
862 [17252] libc: getrandom and getentropy syscall
863 [17730] malloc: thread-local storage is sometimes improperly free()'d
864 after being __libc_memalign()'d
865 [18241] stdio: failed fseek on memstream does not set errno and can fail
867 [18243] nptl: sem_wait, sem_timedwait are cancellation points shm_open is
869 [18463] nptl: pthread_cond_broadcast issue when surrounded by
870 PTHREAD_PRIO_INHERIT mutex on ARM
871 [18784] network: res_query and related function crash for special record
872 type queries (CVE-2015-5180)
873 [19380] math: strtod does not raise "inexact"
874 [19387] string: Integer overflow in memchr
875 [19390] string: Integer overflow in strncat
876 [19398] build: linknamespace tests fail with massively parallel build
877 [19402] nptl: Deadlock with robust shared mutex and asynchronous
879 [19469] malloc: M_PERTURB in test-skeleton.c invalidates malloc tests
880 [19473] malloc: Turn malloc_get_state etc. in compatibility symbols
881 [19514] libc: [PATCH] Fix spelling errors in spelling
882 "implement"/"implementation" in several places
883 [19582] network: Deprecate RES_USE_INET6
884 [19673] manual: clog10 docs appear to be erroneous
885 [19810] dynamic-link: dlopen with both RTLD_NOLOAD and RTLD_NODELETE
886 causes a segmentation fault
887 [19826] libc: invalid pointer returned from __tls_get_addr with static
889 [20016] network: resolv: Remove hooks support from the API
890 [20019] dynamic-link: NULL pointer dereference in libc.so.6 IFUNC due to
892 [20033] math: [x86_64] vectorized math function don't call the __finite
894 [20116] nptl: use after free in pthread_create
895 [20181] stdio: open_memstream(): writes not at end of stream corrupt data
896 [20292] dynamic-link: Comparison in elf/dl-open.c _dl_addr_inside_object
898 [20311] nptl: please install proc_service.h
899 [20366] libc: Compilation errors in installed headers in strict-compliance
901 [20370] malloc: malloc: Arena free list management is still racy
902 (incorrect fix in bug 19243)
903 [20386] libc: assert (X = 0) does not result in GCC warning
904 [20432] malloc: malloc: Minimize interface required for interposition
905 [20435] libc: Missing unwind info in __startcontext causes infinite loop
906 in _Unwind_Backtrace (CVE-2016-6323)
907 [20444] hurd: recvmsg: PF_LOCAL sockets and msg_name lead to SIGLOST
908 [20452] nptl: Addition of sysdep.o to libpthread.a breaks relinking
910 [20455] math: [powerpc] fesetexceptflag fails to clear FE_INVALID
911 [20459] localedata: et_EE: locale has wrong {p,n}_cs_precedes value
912 [20477] network: resolv: incorrect double-checked locking related to
914 [20478] libc: libc_ifunc macro and similar usages leads to false debug-
916 [20495] math: x86_64 performance degradation due to AVX/SSE transition
918 [20497] localedata: lt_LT: LC_TIME d_fmt used is obsolete
919 [20508] dynamic-link: _dl_runtime_resolve_avx/_dl_runtime_profile_avx512
920 cause transition penalty
921 [20517] math: sparcv9 missing fdiml compat symbol
922 [20524] manual: strverscmp is inconsistent
923 [20525] libc: <sys/quota.h> should be based on kernel headers
924 [20539] math: GCC 7 -static -lm fails to link at -O3
925 [20554] libc: ld: bss-plt forced due to /usr/lib/libc_nonshared.a(ppc-
927 [20558] string: POSIX bcopy/bzero decls do not implement Object Size
929 [20591] network: Remove obsolete DNSSEC support
930 [20592] network: DNS resource record type classification macros in
931 <arpa/nameser.h> are incorrect
932 [20593] network: Update DNS RR type definitions
933 [20611] network: getaddrinfo accepts invalid numeric scope IDs
934 [20615] build: glibc build fails when using --with-cpu=power9 --enable-
936 [20629] network: libresolv: Remove support for bitstring labels
938 [20647] libc: GLIBC quitting every program - glibc on Pentium-S leads to
939 assertion: "maxidx >= 2"
940 [20660] math: [arm] Use VSQRT
941 [20662] libc: checking whether x86_64-pc-linux-gnu-gcc implicitly enables
942 -fstack-protector no (32bit gcc 6.2.0 pie and ssp enable)
943 [20689] libc: Test for FMA should also check for AVX.
944 [20707] glob: gl_pathv entries not set to NULL with GLOB_DOOFFS
945 [20715] math: iszero macro breaks existing code
946 [20718] math: [powerpc] copysignl raises "invalid" for sNaN
947 [20728] libc: powerpc: Missing TOC stub in clone
948 [20729] build: glibc-2.24 fails to build for i486 with -Os
949 [20750] build: Build fails with default PIE enabled gcc-6.x
950 [20768] math: [alpha] sqrt fegetenv namespace
951 [20785] libc: binutils 2.28 fails to assemble power6/memset.S file in
953 [20787] math: float_t is defined as float incorrectly on x86_64 even if
954 __FLT_EVAL_METHOD__ is 2
955 [20790] network: rpcgen buffer overrun in get_prog_declaration
956 [20822] nptl: race condition in __lll_unlock_elision on powerpc
957 [20829] libc: crypt snprintf namespace
958 [20847] libc: tst-vfork3 failure
959 [20855] math: Default bits/mathdef.h has inappropriate float_t
960 [20859] math: [sh4] FP_ILOGB0 invalid
961 [20864] localedata: iconv: cp936 missing single-byte euro sign (0x80,
962 U+20AC), not same as GBK
963 [20915] dynamic-link: global-dynamic TLS broken on aarch64
964 [20916] math: pow handling of sNaN arguments
965 [20918] build: Building with --enable-nss-crypt fails tst-linkall-static.
966 [20919] math: Bad pow (qNaN, 0) result with -lieee
967 [20940] math: hypot sNaN handling
968 [20947] math: fmax, fmin sNaN handling
969 [20956] libc: debug/tst-backtrace3-6 don't work with -O3 anymore
970 [20964] network: sunrpc: Stack-based buffer overflow in getrpcport with
972 [20971] string: powerpc64/power7 memchr overflows internal pointer check
973 [20973] nptl: robust mutexes: Lost wake-ups
974 [20974] locale: bs_BA: yesexpr/noexpr regexes accept any character
975 [20978] nis: strlen on null pointer in nss_nisplus
976 [20985] nptl: robust mutexes: lowlevelrobustlock assembly on x86 blocks on
978 [21014] string: i686 memchr overflows internal pointer check
979 [21019] libc: [mips] n32 lseek incorrect on overflow
980 [21022] libc: [microblaze] __backtrace get_frame_size namespace
981 [21026] libc: [MIPS] readahead syscall is broken on n64
982 [21028] math: Fallback fesetexceptflag should always succeed
983 [21045] libc: [powerpc-nofpu] swapcontext does not restore signal mask
984 [21047] math: arm: fpu_control.h: _FPU_GETCW/_FPU_SETCW is rejected by
986 [21053] libc: [SH] Namespace pollution from sys/ucontext.h
987 [21061] librt: [microblaze] librt lost clock_* exports
988 [21073] libc: tunables: insecure environment variables passed to
989 subprocesses with AT_SECURE
990 [21081] string: Missing vzeroupper in memset-vec-unaligned-erms.S
994 * The minimum Linux kernel version that this version of the GNU C Library
995 can be used with is 3.2, except on i[4567]86 and x86_64, where Linux
996 kernel version 2.6.32 or later suffices (on architectures that already
997 required kernel versions more recent than 3.2, those requirements remain
998 unchanged). Linux 3.2 or later kernel headers are required on all
1001 * The pap_AN locale has been deleted. This has been deprecated for a long
1002 time. It has been replaced by pap_AW & pap_CW, both of which have long
1003 been included in previous releases.
1005 * The readdir_r and readdir64_r functions have been deprecated. It is
1006 recommended to use readdir and readdir64 instead.
1008 * The type “union wait” has been removed. It was deprecated in the early
1009 1990s and never part of POSIX. Application code should use the int type
1010 instead of “union wait”.
1012 * A new NSS action is added to facilitate large distributed system
1013 administration. The action, MERGE, allows remote user stores like LDAP
1014 to be merged into local user stores like /etc/groups in order to provide
1015 easy to use, updated, and managed sets of merged credentials. The new
1016 action can be used by configuring it in /etc/nsswitch.conf:
1017 group: files [SUCCESS=merge] nis
1018 Implemented by Stephen Gallagher (Red Hat).
1020 * The deprecated __malloc_initialize_hook variable has been removed from the
1023 * The long unused localedef --old-style option has been removed. It hasn't
1024 done anything in over 16 years. Scripts using this option can safely
1027 * nextupl, nextup, nextupf, nextdownl, nextdown and nextdownf are added to
1028 libm. They are defined by TS 18661 and IEEE754-2008. The nextup functions
1029 return the next representable value in the direction of positive infinity
1030 and the nextdown functions return the next representable value in the
1031 direction of negative infinity. These are currently enabled as GNU
1034 Security related changes:
1036 * An unnecessary stack copy in _nss_dns_getnetbyname_r was removed. It
1037 could result in a stack overflow when getnetbyname was called with an
1038 overly long name. (CVE-2016-3075)
1040 * Previously, getaddrinfo copied large amounts of address data to the stack,
1041 even after the fix for CVE-2013-4458 has been applied, potentially
1042 resulting in a stack overflow. getaddrinfo now uses a heap allocation
1043 instead. Reported by Michael Petlan. (CVE-2016-3706)
1045 * The glob function suffered from a stack-based buffer overflow when it was
1046 called with the GLOB_ALTDIRFUNC flag and encountered a long file name.
1047 Reported by Alexander Cherepanov. (CVE-2016-1234)
1049 * The Sun RPC UDP client could exhaust all available stack space when
1050 flooded with crafted ICMP and UDP messages. Reported by Aldy Hernandez'
1051 alloca plugin for GCC. (CVE-2016-4429)
1053 * The IPv6 name server management code in libresolv could result in a memory
1054 leak for each thread which is created, performs a failing naming lookup,
1055 and exits. Over time, this could result in a denial of service due to
1056 memory exhaustion. Reported by Matthias Schiffer. (CVE-2016-5417)
1058 The following bugs are resolved with this release:
1060 [1170] localedata: ne_NP: update Nepali locale definition file
1061 [3629] manual: stpcpy description in string.texi refers to MS-DOG instead
1063 [6527] malloc: [powerpc] Malloc alignment insufficient for PowerPC
1064 [6796] math: fdim() does not set errno on overflow
1065 [10354] libc: posix_spawn should use vfork() in more cases than presently
1066 [11213] localedata: localedata: add copyright disclaimer to locale files
1067 [12143] localedata: chr_US: new Cherokee locale
1068 [12450] localedata: sgs_LT: new locale
1069 [12676] localedata: ln_CD: new locale
1070 [13237] localedata: LC_ADDRESS.country_name: update all locales w/latest
1072 [13304] math: fma, fmaf, fmal produce wrong results
1073 [14259] build: --localedir arg to configure is ignored
1074 [14499] nptl: Does posix_spawn invoke atfork handlers / use vfork?
1075 [14750] libc: Race condition in posix_spawn vfork usage vs signal handlers
1076 [14934] localedata: es_CL: wrong first weekday chilean locale
1077 [15262] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of
1079 [15263] localedata: LC_MESSAGES.yesexpr/noexpr: inconsistent use of 1/0
1081 [15264] localedata: LC_MESSAGES.yesstr/nostr: lacking in many locales
1082 [15368] nptl: raise() is not async-signal-safe
1083 [15479] math: ceil, floor, round and trunc raise inexact exception
1084 [15578] localedata: kk_KZ: various updates
1085 [16003] localedata: pap_AN: punt old locale
1086 [16137] localedata: iw_IL: punt old locale
1087 [16190] localedata: eo: new esperanto locale
1088 [16374] localedata: lv_LV: change currency symbol in LC_MONETARY to euro
1089 [16742] malloc: race condition: pthread_atfork() called before first
1090 malloc() results in unexpected locking behaviour/deadlocks
1091 [16975] localedata: LC_MESSAGES.yesexpr/noexpr: revisit capitalization in
1093 [16983] localedata: postal_fmt does not allow %l and %n modifiers
1094 [17565] localedata: pt_PT: wrong (work-)week start
1095 [17899] math: [powerpc] floorl returns negative zero with FE_DOWNWARD
1096 [17950] build: Build fails with -msse
1097 [18205] localedata: be_BY*: wrong first_weekday and first_workday
1098 [18433] libc: posix_spawn does not return correctly upon failure to
1100 [18453] localedata: charmaps/IBM875: incorrect codes
1101 [18712] string: bits/string2.h incompatible with -O2 -Werror=packed
1103 [18896] localedata: he_IL: improvements for currency
1104 [18911] localedata: ro_RO: Correcting week day name for "Tuesday" in
1105 Romanian locale data
1106 [18960] locale: s390: _nl_locale_subfreeres uses larl opcode on misaligned
1108 [19056] libc: Deprecate readdir_r
1109 [19133] localedata: pt_*: days & months should be lowercase in Portuguese
1111 [19198] localedata: nl_NL: small improvements for Dutch locales
1112 [19257] network: Per-thread memory leak in __res_vinit with IPv6
1113 nameservers (CVE-2016-5417)
1114 [19269] build: tst-audit4 and tst-audit10 failures with gcc-6 on non avx
1116 [19400] locale: Language missing in "iso-639.def", trivial fix in
1118 [19431] malloc: Deadlock between fflush, getdelim, and fork
1119 [19505] libc: Incorrect file descriptor validity checks in
1120 posix_spawn_file_actions_add{open,close,dup2}
1121 [19509] dynamic-link: dlsym, dlvsym do not report errors through dlerror
1122 when using RTLD_NEXT
1123 [19512] locale: Stale `#ifndef HAVE_BUILTIN_EXPECT' in
1124 `intl/{gettextP,loadinfo}.h'
1125 [19534] libc: execle, execlp may use malloc
1126 [19568] localedata: *_CH: Swiss locales have inconsistent start of week
1127 [19573] network: res_nclose and __res_maybe_init disagree about name
1128 server initialization, breaking Hesiod
1129 [19575] localedata: Status of GB18030 tables
1130 [19581] localedata: sr_* date_fmt string contains additional newline
1131 [19583] string: SSSE3_Fast_Copy_Backward flag needs to be enabled for AMD
1133 [19592] math: [ldbl-128ibm] ceill incorrect in non-default rounding modes
1134 [19593] math: [ldbl-128ibm] truncl incorrect in non-default rounding modes
1135 [19594] math: [ldbl-128ibm] roundl incorrect in non-default rounding modes
1136 [19595] math: [ldbl-128ibm] fmodl incorrect for results in subnormal
1138 [19602] math: [ldbl-128ibm] fmodl handling of equal arguments with low
1140 [19603] math: [ldbl-128ibm] remainderl, remquol incorrect sign handling in
1142 [19610] dynamic-link: ldconfig -X removes stale symbolic links
1143 [19613] libc: s390x (64 bit) macro expansion WCOREDUMP and others
1144 [19633] locale: strfmon_l applies global locale to number formatting
1145 [19642] network: Memory leak in getnameinfo
1146 [19648] libc: test-skeleton.c: Do not set RLIMIT_DATA
1147 [19653] libc: Potential for NULL pointer dereference (CWE-476) in
1149 [19654] math: [x86_64] Need testcase for BZ #19590 fix
1150 [19671] localedata: Missing Sanity Check for malloc() in 'tst-fmon.c' &
1152 [19674] math: [ldbl-128ibm] powl incorrect overflow handling
1153 [19677] math: [ldbl-128ibm] remainderl equality test incorrect for zero
1155 [19678] math: [ldbl-128ibm] nextafterl, nexttowardl incorrect sign of zero
1157 [19679] dynamic-link: gcc-4.9.3 C++ exception handling broken due to
1159 [19726] locale: Converting UCS4LE to INTERNAL with iconv() does not update
1160 pointers and lengths in error-case.
1161 [19727] locale: Converting from/to UTF-xx with iconv() does not always
1162 report errors on UTF-16 surrogates values.
1163 [19755] nscd: nscd assertion failure in gc
1164 [19758] dynamic-link: Typo in EXTRA_LD_ENVVARS for x86-64
1165 [19759] libc: mempcpy shouldn't be inlined
1166 [19762] dynamic-link: HAS_CPU_FEATURE/HAS_ARCH_FEATURE are easy to misuse
1167 [19765] libc: s390 needs an optimized mempcpy
1168 [19779] glob: glob: buffer overflow with GLOB_ALTDIRFUNC due to incorrect
1169 NAME_MAX limit assumption (CVE-2016-1234)
1170 [19783] build: benchtests don't support --enable-hardcoded-path-in-tests
1171 [19787] network: Missing and incorrect truncation checks in getnameinfo
1172 [19790] math: [ldbl-128ibm] nearbyintl incorrect in non-default rounding
1174 [19791] network: Assertion failure in res_query.c with un-connectable name
1176 [19792] libc: MIPS: backtrace yields infinite backtrace with makecontext
1177 [19822] math: libm.so install clobbers old version
1178 [19825] network: resolv: send_vc can return uninitialized data in second
1179 response to getaddrinfo
1180 [19830] network: nss_dns: should check RDATA length against buffer length
1181 [19831] network: nss_dns: getaddrinfo returns uninitialized data when
1182 confronted with A/AAAA records of invalid size
1183 [19837] nss: nss_db: No retries for some long lines with a larger buffer
1184 [19848] math: powl(10,n) for n=-4,-5,-6,-7 is off by more than 1 ULP
1185 [19853] stdio: Printing IBM long double in decimal with high precision is
1187 [19860] build: x86_64: compile errors for tst-audit10 and tst-auditmod10b
1188 [19861] nptl: libpthread IFUNC resolver for fork can lead to crash
1189 [19862] network: resolv, nss_dns: Remove remaining logging of unexpected
1191 [19865] network: Assertion failure or memory leak in
1192 _nss_dns_getcanonname_r
1193 [19868] network: nss_dns: netent code does not skip over non-PTR records
1194 [19879] network: nss_dns: Stack overflow in getnetbyname implementation
1196 [19881] string: Improve x86-64 memset
1197 [19907] string: Incorrect memcpy tests
1198 [19916] dynamic-link: S390: fprs/vrs are not saved/restored while
1200 [19925] libc: termios.h XCASE namespace
1201 [19928] string: memmove-vec-unaligned-erms.S is slow with large data size
1202 [19929] libc: limits.h NL_NMAX namespace
1203 [19931] stdio: Memory leak in vfprintf
1204 [19957] libc: clone(CLONE_VM) access invalid parent memory
1205 [19963] localedata: en_IL: New locale
1206 [19989] stdio: stdio.h cuserid namespace
1207 [19994] network: getaddrinfo does not restore RES_USE_INET6 flag in
1209 [19996] locale: langinfo.h nl_langinfo_l namespace
1210 [20005] stdio: fflush on a file opened with fmemopen resets position to 0
1211 [20010] network: getaddrinfo: Stack overflow in hostent translation
1213 [20012] stdio: libio: fmemopen append mode failure
1214 [20014] stdio: stdio.h namespace for pre-threads POSIX
1215 [20017] network: resolv: Use gmtime_r instead of gmtime in p_secstodate
1216 [20023] libc: fcntl.h timespec namespace
1217 [20024] math: [x86_64] vectorized sincos trashes the stack
1218 [20031] network: nss_hesiod: Heap overflow in get_txt_records
1219 [20041] time: sys/time.h timespec namespace
1220 [20043] libc: unistd.h missing cuserid for UNIX98 and before
1221 [20044] libc: unistd.h missing pthread_atfork for UNIX98
1222 [20051] libc: ttyslot in wrong header under wrong conditions
1223 [20054] libc: gethostname not declared for XPG4
1224 [20055] libc: termios.h missing tcgetsid for XPG4
1225 [20072] dynamic-link: x86 init_cpu_features is called twice in static
1227 [20073] libc: sys/stat.h fchmod namespace
1228 [20074] libc: stdlib.h rand_r namespace
1229 [20076] libc: sys/stat.h missing S_IFSOCK, S_ISSOCK for XPG4
1230 [20094] libc: stdlib.h should not declare grantpt, ptsname, unlockpt for
1232 [20111] libc: struct sockaddr_storage cannot be aggregate-copied
1233 [20112] network: sunrpc: stack (frame) overflow in Sun RPC clntudp_call
1235 [20115] string: Extra alignment in memset-vec-unaligned-erms.S
1236 [20119] libc: Wrong mask for processors level type from CPUID
1237 [20139] dynamic-link: Upper part of zmm is zeroed if Glibc is built with
1238 AS not supporting AVX512
1239 [20151] math: [ldbl-128/ldbl-128ibm] j0l, j1l, y0l, y1l return sNaN for
1241 [20153] math: [ldbl-128ibm] sqrtl (sNaN) returns sNaN
1242 [20156] math: [ldbl-128ibm] ceill, rintl etc. return sNaN for sNaN
1244 [20157] math: [powerpc] fabsl (sNaN) wrongly raises "invalid"
1245 [20160] math: [powerpc] ceil, rint etc. return sNaN for sNaN input
1246 [20178] libc: posix_spawn{p} should not call exit
1247 [20191] stdio: libio: vtables hardening
1248 [20195] string: FMA4 detection requires CPUID execution with register
1250 [20198] libc: quick_exit incorrectly destroys C++11 thread objects.
1251 [20205] math: [i386/x86_64] nextafterl incorrect incrementing negative
1253 [20212] math: acos (sNaN) returns sNaN
1254 [20213] math: asin (sNaN) returns sNaN
1255 [20214] network: Linux header sync with linux/in6.h and ipv6.h again.
1256 [20218] math: [i386] asinhl (sNaN) returns sNaN
1257 [20219] math: [i386] atanhl (sNaN) returns sNaN
1258 [20222] stdio: fopencookie: Mangle function pointers
1259 [20224] math: [i386] cbrtl (sNaN) returns sNaN
1260 [20225] math: ldexp, scalbn, scalbln return sNaN for sNaN input
1261 [20226] math: [i386/x86_64] expl, exp10l, expm1l return sNaN for sNaN
1263 [20227] math: [i386/x86_64] logl (sNaN) returns sNaN
1264 [20228] math: [i386/x86_64] log10l (sNaN) returns sNaN
1265 [20229] math: [i386/x86_64] log1pl (sNaN) returns sNaN
1266 [20232] math: [ldbl-128] expm1l (sNaN) returns sNaN
1267 [20233] math: [ldbl-128ibm] expm1l (sNaN) returns sNaN
1268 [20234] math: [ldbl-128ibm] log1pl (sNaN) returns sNaN
1269 [20235] math: [i386/x86_64] log2l (sNaN) returns sNaN
1270 [20237] nss: nss_db: get*ent segfaults without preceding set*ent
1271 [20240] math: modf (sNaN) returns sNaN
1272 [20248] libc: debug/tst-longjump_chk2 calls printf from a signal handler
1273 [20250] math: frexp (sNaN) returns sNaN
1274 [20252] math: atan2 (sNaN, qNaN) fails to raise "invalid"
1275 [20255] math: [i386] fdim, fdimf return with excess range and precision /
1277 [20256] math: [i386/x86_64] fdiml returns sNaN for sNaN input
1278 [20260] string: ../sysdeps/x86/bits/string.h:1092:3: error: array
1279 subscript is below array bounds [-Werror=array-bounds]
1280 [20262] nis: _nss_nis_initgroups_dyn always returns NSS_STATUS_NOTFOUND
1281 [20263] nptl: robust mutex deadlocks if other thread requests timedlock
1283 [20277] libc: $dp is not initialized correctly in sysdeps/hppa/start.S
1284 [20284] malloc: malloc: Corrupt arena avoidance causes unnecessary mmap
1286 [20296] math: [i386/x86_64] scalbl returns sNaN for sNaN input, missing
1287 "invalid" exceptions
1288 [20314] nptl: make[4]: *** [/usr/include/stdlib.h] Error 1
1289 [20316] localedata: id_ID: Februari instead of Pebruari
1290 [20327] string: POWER8 strcasecmp returns incorrect result
1291 [20347] math: Failure: Test: j0_downward (0xap+0)
1292 [20348] libc: FAIL: misc/tst-preadvwritev64
1293 [20349] libc: 64-bit value is passed differently in p{readv,writev}{64}
1294 [20350] libc: There is no test for p{read,write}64
1295 [20357] math: Incorrect cos result for 1.5174239687223976
1296 [20384] build: Don't run libmvec-sincos-avx* tests on non avx machines
1300 * Unicode 8.0.0 Support: Character encoding, character type info, and
1301 transliteration tables are all updated to Unicode 8.0.0, using new
1302 and/or improved generator scripts contributed by Mike FABIAN (Red Hat).
1303 These updates cause user visible changes, such as the fixes for bugs
1304 89, 16061, and 18568.
1306 * sched_setaffinity, pthread_setaffinity_np no longer attempt to guess the
1307 kernel-internal CPU set size. This means that requests that change the
1308 CPU affinity which failed before (for example, an all-ones CPU mask) will
1309 now succeed. Applications that need to determine the effective CPU
1310 affinities need to call sched_getaffinity or pthread_getaffinity_np after
1311 setting it because the kernel can adjust it (and the previous size check
1312 would not detect this in the majority of cases).
1314 * The fts.h header can now be used with -D_FILE_OFFSET_BITS=64. With LFS
1315 the following new symbols are used: fts64_children, fts64_close,
1316 fts64_open, fts64_read and fts64_set.
1318 * getaddrinfo now detects certain invalid responses on an internal netlink
1319 socket. If such responses are received, an affected process will
1320 terminate with an error message of "Unexpected error <number> on netlink
1321 descriptor <number>" or "Unexpected netlink response of size <number> on
1322 descriptor <number>". The most likely cause for these errors is a
1323 multi-threaded application which erroneously closes and reuses the netlink
1324 file descriptor while it is used by getaddrinfo.
1326 * A defect in the malloc implementation, present since glibc 2.15 (2012) or
1327 glibc 2.10 via --enable-experimental-malloc (2009), could result in the
1328 unnecessary serialization of memory allocation requests across threads.
1329 The defect is now corrected. Users should see a substantial increase in
1330 the concurent throughput of allocation requests for applications which
1331 trigger this bug. Affected applications typically create and
1332 destroy threads frequently. (Bug 19048 was reported and analyzed by
1335 * There is now a --disable-timezone-tools configure option for disabling the
1336 building and installing of the timezone related utilities (zic, zdump, and
1337 tzselect). This is useful for people who build the timezone data and code
1338 independent of the GNU C Library.
1340 * The obsolete header <regexp.h> has been removed. Programs that require
1341 this header must be updated to use <regex.h> instead.
1343 * The obsolete functions bdflush, create_module, get_kernel_syms,
1344 query_module and uselib are no longer available to newly linked binaries;
1345 the header <sys/kdaemon.h> has been removed. These functions and header
1346 were specific to systems using the Linux kernel and could not usefully be
1347 used with the GNU C Library on systems with version 2.6 or later of the
1350 * Optimized string, wcsmbs and memory functions for IBM z13.
1351 Implemented by Stefan Liebler.
1353 * Newly linked programs that define a variable called signgam will no longer
1354 have it set by the lgamma, lgammaf and lgammal functions. Programs that
1355 require signgam to be set by those functions must ensure that they use the
1356 variable provided by the GNU C Library and declared in <math.h>, without
1357 defining their own copy.
1359 * The minimum GCC version that can be used to build this version of the GNU
1360 C Library is GCC 4.7. Older GCC versions, and non-GNU compilers, can
1361 still be used to compile programs using the GNU C Library.
1363 Security related changes:
1365 * An out-of-bounds value in a broken-out struct tm argument to strftime no
1366 longer causes a crash. Reported by Adam Nielsen. (CVE-2015-8776)
1368 * The LD_POINTER_GUARD environment variable can no longer be used to disable
1369 the pointer guard feature. It is always enabled. Previously,
1370 LD_POINTER_GUARD could be used to disable security hardening in binaries
1371 running in privileged AT_SECURE mode. Reported by Hector Marco-Gisbert.
1374 * An integer overflow in hcreate and hcreate_r could lead to an
1375 out-of-bounds memory access. Reported by Szabolcs Nagy. (CVE-2015-8778)
1377 * The catopen function no longer has unbounded stack usage. Reported by
1378 Max. (CVE-2015-8779)
1380 * The nan, nanf and nanl functions no longer have unbounded stack usage
1381 depending on the length of the string passed as an argument to the
1382 functions. Reported by Joseph Myers. (CVE-2014-9761)
1384 * A stack-based buffer overflow was found in libresolv when invoked from
1385 libnss_dns, allowing specially crafted DNS responses to seize control
1386 of execution flow in the DNS client. The buffer overflow occurs in
1387 the functions send_dg (send datagram) and send_vc (send TCP) for the
1388 NSS module libnss_dns.so.2 when calling getaddrinfo with AF_UNSPEC
1389 family. The use of AF_UNSPEC triggers the low-level resolver code to
1390 send out two parallel queries for A and AAAA. A mismanagement of the
1391 buffers used for those queries could result in the response of a query
1392 writing beyond the alloca allocated buffer created by
1393 _nss_dns_gethostbyname4_r. Buffer management is simplified to remove
1394 the overflow. Thanks to the Google Security Team and Red Hat for
1395 reporting the security impact of this issue, and Robert Holiday of
1396 Ciena for reporting the related bug 18665. (CVE-2015-7547)
1398 The following bugs are resolved with this release:
1400 [89] localedata: Locales nb_NO and nn_NO should transliterate æøå
1401 [887] math: Math library function "logb" and "nextafter" inconsistent
1402 [2542] math: Incorrect return from float gamma (-0X1.FA471547C2FE5P+1)
1403 [2543] math: Incorrect return from float gamma (-0X1.9260DCP+1)
1404 [2558] math: Incorrect return from double gamma (-0X1.FA471547C2FE5P+1)
1405 [2898] libc: [improve] warning: the use of `mktemp' is dangerous, better
1407 [4404] localedata: German translation of "Alarm clock" is misleading
1408 [6799] math: nextafter() and nexttoward() doen't set errno on
1409 overflow/underflow errors
1410 [6803] math: scalb(), scalbln(), scalbn() do not set errno on
1412 [10432] nis: _nss_nis_setnetgrent assertion failure
1413 [11460] libc: fts has no LFS support
1414 [12926] network: getaddrinfo()/make_request() may spin forever
1415 [13065] nptl: Race condition in pthread barriers
1416 [13690] nptl: pthread_mutex_unlock potentially cause invalid access
1417 [14341] dynamic-link: Dynamic linker crash when DT_JMPREL and DT_REL{,A}
1419 [14551] math: [ldbl-128ibm] strtold overflow handling for IBM long double
1420 [14912] libc: Rename non-installed bits/*.h headers
1421 [15002] libc: Avoid undefined behavior in posix_fallocate overflow check
1422 [15367] math: Let gcc use __builtin_isinf
1423 [15384] math: One constant fewer in ieee754/dbl-64/wordsize-64/s_finite.c
1424 [15421] math: lgamma wrongly sets signgam for ISO C
1425 [15470] math: [arm] On ARM llrintl() and llroundl() do not raise
1426 FE_INVALID with argument out of range
1427 [15491] math: [i386/x86_64] x86 nearbyint implementations wrongly clear
1429 [15786] dynamic-link: ifunc resolver functions can smash function
1431 [15918] math: Unnecessary check for equality in hypotf()
1432 [16061] localedata: Review / update transliteration data
1433 [16068] math: [i386/x86_64] x86 and x86_64 fesetenv exclude state they
1435 [16141] time: strptime %z offset restriction
1436 [16171] math: drem should be alias of remainder
1437 [16296] math: fegetround is pure?
1438 [16347] math: [ldbl-128ibm] ldbl-128/e_lgammal_r.c may not be suitable.
1439 [16364] libc: sleep may leave SIGCHLD blocked on sync cancellation on
1441 [16399] math: [mips] lrint / llrint / lround / llround missing exceptions
1442 [16415] math: Clean up ldbl-128 / ldbl-128ibm expm1l for large positive
1444 [16422] math: [powerpc] math-float, math-double failing llrint tests with
1445 "Exception "Inexact" set" on ppc32
1446 [16495] localedata: nl_NL: date_fmt: shuffle year/month around
1447 [16517] math: Missing underflow exception from tanf/tan/tanl
1448 [16519] math: Missing underflow exception from sinhf
1449 [16520] math: Missing underflow exception from tanhf
1450 [16521] math: Missing underflow exception from exp2
1451 [16620] math: [ldbl-128ibm] exp10l spurious overflows / bad directed
1453 [16734] stdio: fopen calls mmap to allocate its buffer
1454 [16961] math: nan function incorrect handling of bad sequences
1455 [16962] math: nan function unbounded stack allocation (CVE-2014-9761)
1456 [16973] localedata: Fix lang_lib/lang_term as per ISO 639-2
1457 [16985] locale: localedef: confusing error message when opening output
1459 [17118] math: ctanh(INFINITY + 2 * I) returns incorrect value
1460 [17197] locale: Redundant shift character in iconv conversion output at
1462 [17243] libc: trunk/posix/execl.c:53: va_args problem ?
1463 [17244] libc: trunk/sysdeps/unix/sysv/linux/semctl.c:116: va_args muxup ?
1464 [17250] dynamic-link: static linking breaks nss loading
1465 (getaddrinfo/getpwnam/etc...)
1466 [17404] libc: atomic_exchange_rel lacking a barrier on MIPS16, GCC before
1468 [17441] math: isnan() should use __builtin_isnan() in GCC
1469 [17514] nptl: Assert failure unlocking ERRORCHECK mutex after timedlock
1470 (related to lock elision)
1471 [17787] manual: Exponent on page 324 of the PDF ends prematurely
1472 [17886] time: strptime should be able to parse "Z" as a timezone with %z
1473 [17887] time: strptime should be able to parse "+01:00" style timezones
1474 [17905] libc: catopen() Multiple unbounded stack allocations
1476 [18084] libc: backtrace (..., 0) dumps core on x86
1477 [18086] libc: nice() sets errno to 0 on success
1478 [18240] libc: hcreate, hcreate_r should fail with ENOMEM if element count
1479 is too large (CVE-2015-8778)
1480 [18251] dynamic-link: SONAME missing when audit modules provides path
1481 [18265] libc: add attributes for wchar string and memory functions
1482 [18370] math: csqrt missing underflows
1483 [18421] libc: [hppa] read-only segment has dynamic relocations
1484 [18472] libc: Obsolete syscall wrappers should be compat symbols
1485 [18480] libc: hppa glibc miscompilation in sched_setaffinity()
1486 [18491] localedata: Update tr_TR LC_CTYPE as part of Unicode updates
1487 [18525] localedata: Remove locale timezone information
1488 [18560] libc: [powerpc] spurious bits/ipc.h definitions
1489 [18568] localedata: Update locale data to Unicode 8.0
1490 [18589] locale: sort-test.sh fails at random
1491 [18595] math: ctan, ctanh missing underflows
1492 [18604] libc: assert macro-expands its argument
1493 [18610] math: S390: fetestexcept() reports any exception if DXC-code
1494 contains a vector instruction exception.
1495 [18611] math: j1, jn missing errno setting on underflow
1496 [18618] localedata: sync Chechen locale definitions with other *_RU
1498 [18647] math: powf(-0x1.000002p0, 0x1p30) returns 0 instead of +inf
1499 [18661] libc: Some x86-64 assembly codes don't align stack to 16 bytes
1500 [18665] network: In send_dg, the recvfrom function is NOT always using the
1501 buffer size of a newly created buffer (CVE-2015-7547)
1502 [18674] libc: [i386] trunk/sysdeps/i386/tst-auditmod3b.c:84: possible
1504 [18675] libc: fpathconf(_PC_NAME_MAX) fails against large filesystems for
1506 [18681] libc: regexp.h is obsolete and buggy, and should be desupported
1507 [18699] math: tilegx cproj() for various complex infinities does not yield
1509 [18724] libc: Harden put*ent functions against data injection
1510 [18743] nptl: PowerPC: findutils testcase fails with --enable-lock-elision
1511 [18755] build: build errors with -DNDEBUG
1512 [18757] stdio: fmemopen fails to set errno on failure
1513 [18778] dynamic-link: ld.so crashes if failed dlopen causes libpthread to
1515 [18781] libc: openat64 lacks O_LARGEFILE
1516 [18787] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/atomic.h:71:6:
1517 error: can’t find a register in class ‘R1_REGS’ while reloading ‘asm’
1518 [18789] math: [ldbl-128ibm] sinhl inaccurate near 0
1519 [18790] math: [ldbl-128ibm] tanhl inaccurate
1520 [18795] libc: stpncpy fortification misses buffer lengths that are
1521 statically too large
1522 [18796] build: build fails for --disable-mathvec
1523 [18803] math: hypot missing underflows
1524 [18820] stdio: fmemopen may leak memory on failure
1525 [18823] math: csqrt spurious underflows
1526 [18824] math: fma spurious underflows
1527 [18825] math: pow missing underflows
1528 [18857] math: [ldbl-128ibm] nearbyintl wrongly uses signaling comparisons
1529 [18868] nptl: pthread_barrier_init typo has in-theory-undefined behavior
1530 [18870] build: sem_open.c fails to compile with missing symbol
1532 [18872] stdio: Fix memory leak in printf_positional
1533 [18873] libc: posix_fallocate overflow check ineffective
1534 [18875] math: Excess precision leads incorrect libm
1535 [18877] libc: arm: mmap offset regression
1536 [18887] libc: memory corruption when using getmntent on blank lines
1537 [18918] localedata: hu_HU: change time to HH:MM:SS format
1538 [18921] libc: Regression: extraneous stat() and fstat() performed by
1540 [18928] dynamic-link: LD_POINTER_GUARD is not ignored for privileged
1541 binaries (CVE-2015-8777)
1542 [18951] math: tgamma missing underflows
1543 [18952] math: [ldbl-128/ldbl-128ibm] lgammal spurious "invalid", incorrect
1545 [18953] localedata: lt_LT: change currency symbol to the euro
1546 [18956] math: powf inaccuracy
1547 [18961] math: [i386] exp missing underflows
1548 [18966] math: [i386] exp10 missing underflows
1549 [18967] math: math.h XSI POSIX namespace (gamma, isnan, scalb)
1550 [18969] build: multiple string test failures due to missing locale
1552 [18970] libc: Reference of pthread_setcancelstate in libc.a
1553 [18977] math: float / long double Bessel functions not in XSI POSIX
1554 [18980] math: i386 libm functions return with excess range and precision
1555 [18981] math: i386 scalb*, ldexp return with excess range and precision
1556 [18982] stdio: va_list and vprintf
1557 [18985] time: Passing out of range data to strftime() causes a segfault
1559 [19003] math: [x86_64] fma4 version of pow inappropriate contraction
1560 [19007] libc: FAIL: elf/check-localplt with -z now and binutils 2.26
1561 [19012] locale: iconv_open leaks memory on error path
1562 [19016] math: clog, clog10 inaccuracy
1563 [19018] nptl: Mangle function pointers in tls_dtor_list
1564 [19032] math: [i386] acosh (-qNaN) spurious "invalid" exception
1565 [19046] math: ldbl-128 / ldbl-128ibm lgamma bad overflow handling
1566 [19048] malloc: malloc: arena free list can become cyclic, increasing
1568 [19049] math: [powerpc] erfc incorrect zero sign
1569 [19050] math: [powerpc] log* incorrect zero sign
1570 [19058] math: [x86_64] Link fail with -fopenmp and -flto
1571 [19059] math: nexttoward overflow incorrect in non-default rounding modes
1572 [19071] math: ldbl-96 lroundl incorrect just below powers of 2
1573 [19074] network: Data race in _res_hconf_reorder_addrs
1574 [19076] math: [ldbl-128ibm] log1pl (-1) wrong sign of infinity
1575 [19077] math: [ldbl-128ibm] logl (1) incorrect sign of zero result
1576 [19078] math: [ldbl-128ibm] expl overflow incorrect in non-default
1578 [19079] math: dbl-64/wordsize-64 lround based on llround incorrect for
1580 [19085] math: ldbl-128 lrintl, lroundl missing exceptions for 32-bit long
1581 [19086] manual: posix_fallocate64 documented argument order is wrong.
1582 [19088] math: lround, llround missing exceptions close to overflow
1584 [19094] math: lrint, llrint missing exceptions close to overflow threshold
1585 [19095] math: dbl-64 lrint incorrect for 64-bit long
1586 [19122] dynamic-link: Unnecessary PLT relocations in librtld.os
1587 [19124] dynamic-link: ld.so failed to build with older assmebler
1588 [19125] math: [powerpc32] llroundf, llround incorrect exceptions
1589 [19129] dynamic-link: [arm] Concurrent lazy TLSDESC resolution can crash
1590 [19134] math: [powerpc32] lround, lroundf spurious exceptions
1591 [19137] libc: i386/epoll_pwait.S doesn't support cancellation
1592 [19143] nptl: Remove CPU set size checking from sched_setaffinity,
1593 pthread_setaffinity_np
1594 [19156] math: [ldbl-128] j0l spurious underflows
1595 [19164] nptl: tst-getcpu fails with many possible CPUs
1596 [19168] math: math/test-ildoubl and math/test-ldouble failure
1597 [19174] nptl: PowerPC: TLE enabled pthread mutex performs poorly.
1598 [19178] dynamic-link: ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA confuses
1600 [19181] math: [i386/x86_64] fesetenv (FE_DFL_ENV), fesetenv
1601 (FE_NOMASK_ENV) do not clear SSE exceptions
1602 [19182] malloc: malloc deadlock between ptmalloc_lock_all and
1603 _int_new_arena/reused_arena
1604 [19189] math: [ldbl-128] log1pl (-qNaN) spurious "invalid" exception
1605 [19201] math: dbl-64 remainder incorrect sign of zero result
1606 [19205] math: bits/math-finite.h conditions do not match math.h and
1608 [19209] math: bits/math-finite.h wrongly maps ldexp to scalbn
1609 [19211] math: lgamma functions do not set signgam for -ffinite-math-only
1610 for C99-based standards
1611 [19212] libc: features.h not -Wundef clean
1612 [19213] math: [i386/x86_64] log* (1) incorrect zero sign for -ffinite-
1614 [19214] libc: Family and model identification for AMD CPU's are incorrect.
1615 [19219] libc: GLIBC build fails for ia64 with missing __nearbyintl
1616 [19228] math: [powerpc] nearbyint wrongly clears "inexact", leaves traps
1618 [19235] math: [powerpc64] lround, lroundf, llround, llroundf spurious
1619 "inexact" exceptions
1620 [19238] math: [powerpc] round, roundf spurious "inexact" for integer
1622 [19242] libc: strtol incorrect in Turkish locales
1623 [19243] malloc: reused_arena can pick an arena on the free list, leading
1624 to an assertion failure and reference count corruption
1625 [19253] time: tzset() ineffective when temporary TZ did not include DST
1627 [19266] math: strtod ("NAN(I)") incorrect in Turkish locales
1628 [19270] math: [hppa] Shared libm missing __isnanl
1629 [19285] libc: [hppa] sysdeps/unix/sysv/linux/hppa/bits/mman.h: missing
1630 MAP_HUGETLB and MAP_STACK defines
1631 [19313] nptl: Wrong __cpu_mask for x32
1632 [19347] libc: grantpt: try to force a specific gid even without pt_chown
1633 [19349] math: [ldbl-128ibm] tanhl inaccurate for small arguments
1634 [19350] math: [ldbl-128ibm] sinhl spurious overflows
1635 [19351] math: [ldbl-128ibm] logl inaccurate near 1
1636 [19363] time: x32: times() return value wrongly truncates/sign extends
1638 [19367] dynamic-link: Improve branch prediction on Silvermont
1639 [19369] network: Default domain name not reset by res_ninit when "search"
1640 / "domain" entry is removed from resolv.conf
1641 [19375] math: powerpc: incorrect results for POWER7 logb with negative
1643 [19385] localedata: bg_BG: time separator should be colon, not comma
1644 [19408] libc: linux personality syscall wrapper may erroneously return an
1645 error on 32-bit architectures
1646 [19415] libc: dladdr returns wrong names on hppa
1647 [19432] libc: iconv rejects redundant escape sequences in IBM900, IBM903,
1648 IBM905, IBM907, and IBM909
1649 [19439] math: Unix98 isinf and isnan functions conflict with C++11
1650 [19443] build: build failures with -DDEBUG
1651 [19451] build: Make check fails on test-double-vlen2
1652 [19462] libc: Glibc failed to build with -Os
1653 [19465] math: Wrong code with -Os
1654 [19466] time: time/tst-mktime2.c is compiled into an infinite loop with
1656 [19467] string: Fast_Unaligned_Load needs to be enabled for Excavator core
1658 [19475] libc: Glibc 2.22 doesn't build on sparc [PATCH]
1659 [19486] math: S390: Math tests fail with "Exception Inexact set".
1660 [19529] libc: [ARM]: FAIL: stdlib/tst-makecontext
1661 [19550] libc: [mips] mmap negative offset handling inconsistent with other
1663 [19590] math: Fail to build shared objects that use libmvec.so functions.
1667 * The following bugs are resolved with this release:
1669 438, 2981, 4719, 6544, 6792, 11216, 12836, 13028, 13064, 13151, 13152,
1670 14094, 14113, 14292, 14841, 14906, 14958, 15319, 15467, 15790, 15969,
1671 16159, 16339, 16350, 16351, 16352, 16353, 16361, 16512, 16526, 16538,
1672 16559, 16560, 16704, 16783, 16850, 17053, 17090, 17195, 17269, 17293,
1673 17322, 17403, 17475, 17523, 17542, 17569, 17581, 17588, 17596, 17620,
1674 17621, 17628, 17631, 17692, 17711, 17715, 17776, 17779, 17792, 17833,
1675 17836, 17841, 17912, 17916, 17930, 17932, 17944, 17949, 17964, 17965,
1676 17967, 17969, 17977, 17978, 17987, 17991, 17996, 17998, 17999, 18007,
1677 18019, 18020, 18029, 18030, 18032, 18034, 18036, 18038, 18039, 18042,
1678 18043, 18046, 18047, 18049, 18068, 18078, 18080, 18093, 18100, 18104,
1679 18110, 18111, 18116, 18125, 18128, 18134, 18138, 18185, 18196, 18197,
1680 18206, 18210, 18211, 18217, 18219, 18220, 18221, 18234, 18244, 18245,
1681 18247, 18287, 18319, 18324, 18333, 18346, 18371, 18383, 18397, 18400,
1682 18409, 18410, 18412, 18418, 18422, 18434, 18444, 18457, 18468, 18469,
1683 18470, 18479, 18483, 18495, 18496, 18497, 18498, 18502, 18507, 18508,
1684 18512, 18513, 18519, 18520, 18522, 18527, 18528, 18529, 18530, 18532,
1685 18533, 18534, 18536, 18539, 18540, 18542, 18544, 18545, 18546, 18547,
1686 18549, 18553, 18557, 18558, 18569, 18583, 18585, 18586, 18592, 18593,
1687 18594, 18602, 18612, 18613, 18619, 18633, 18635, 18641, 18643, 18648,
1688 18657, 18676, 18694, 18696, 18887.
1690 * Cache information can be queried via sysconf() function on s390 e.g. with
1691 _SC_LEVEL1_ICACHE_SIZE as argument.
1693 * A buffer overflow in gethostbyname_r and related functions performing DNS
1694 requests has been fixed. If the NSS functions were called with a
1695 misaligned buffer, the buffer length change due to pointer alignment was
1696 not taken into account. This could result in application crashes or,
1697 potentially arbitrary code execution, using crafted, but syntactically
1698 valid DNS responses. (CVE-2015-1781)
1700 * The time zone file parser has been made more robust against crafted time
1701 zone files, avoiding heap buffer overflows related to the processing of
1702 the tzh_ttisstdcnt and tzh_ttisgmtcnt fields, and a stack overflow due to
1703 large time zone data files. Overly long time zone specifiers in the TZ
1704 variable no longer result in stack overflows and crashes.
1706 * A powerpc and powerpc64 optimization for TLS, similar to TLS descriptors
1707 for LD and GD on x86 and x86-64, has been implemented. You will need
1708 binutils-2.24 or later to enable this optimization.
1710 * Character encoding and ctype tables were updated to Unicode 7.0.0, using
1711 new generator scripts contributed by Pravin Satpute and Mike FABIAN (Red
1712 Hat). These updates cause user visible changes, such as the fix for bug
1715 * CVE-2014-8121 The NSS backends shared internal state between the getXXent
1716 and getXXbyYY NSS calls for the same database, causing a denial-of-service
1717 condition in some applications.
1719 * Added vector math library named libmvec with the following vectorized x86_64
1720 implementations: cos, cosf, sin, sinf, sincos, sincosf, log, logf, exp, expf,
1722 The library can be disabled with --disable-mathvec. Use of the functions is
1723 enabled with -fopenmp -ffast-math starting from -O1 for GCC version >= 4.9.0.
1724 Shared library libmvec.so is linked in as needed when using -lm (no need to
1725 specify -lmvec explicitly for not static builds).
1726 Visit <https://sourceware.org/glibc/wiki/libmvec> for detailed information.
1728 * A new fmemopen implementation has been added with the goal of POSIX
1729 compliance. The new implementation fixes the following long-standing
1730 issues: BZ#6544, BZ#11216, BZ#12836, BZ#13151, BZ#13152, and BZ#14292. The
1731 old implementation is still present for use be by existing binaries.
1733 * The 32-bit sparc sigaction ABI was inadvertently broken in the 2.20 and 2.21
1734 releases. It has been fixed to match 2.19 and older, but binaries built
1735 against 2.20 and 2.21 might need to be recompiled. See BZ#18694.
1737 * Port to Native Client running on ARMv7-A (--host=arm-nacl).
1738 Contributed by Roland McGrath (Google).
1740 * The header <regexp.h> is deprecated, and will be removed in a future
1741 release. Use of this header will trigger a deprecation warning.
1742 Application developers should update their code to use <regex.h> instead.
1744 This header was formerly part of SUS, but was deprecated in 1994 and
1745 removed from the standard in 2001. Also, the glibc implementation
1746 leaks memory. See BZ#18681 for more details.
1750 * The following bugs are resolved with this release:
1752 6652, 10672, 12674, 12847, 12926, 13862, 14132, 14138, 14171, 14498,
1753 15215, 15378, 15884, 16009, 16418, 16191, 16469, 16576, 16617, 16618,
1754 16619, 16657, 16740, 16857, 17192, 17266, 17273, 17344, 17363, 17370,
1755 17371, 17411, 17460, 17475, 17485, 17501, 17506, 17508, 17522, 17555,
1756 17570, 17571, 17572, 17573, 17574, 17582, 17583, 17584, 17585, 17589,
1757 17594, 17601, 17608, 17616, 17625, 17630, 17633, 17634, 17635, 17647,
1758 17653, 17657, 17658, 17664, 17665, 17668, 17682, 17702, 17717, 17719,
1759 17722, 17723, 17724, 17725, 17732, 17733, 17744, 17745, 17746, 17747,
1760 17748, 17775, 17777, 17780, 17781, 17782, 17791, 17793, 17796, 17797,
1761 17801, 17803, 17806, 17834, 17844, 17848, 17868, 17869, 17870, 17885,
1764 * CVE-2015-1472 CVE-2015-1473 Under certain conditions wscanf can allocate
1765 too little memory for the to-be-scanned arguments and overflow the
1766 allocated buffer. The implementation now correctly computes the required
1767 buffer size when using malloc, and switches to malloc from alloca as
1770 * A new semaphore algorithm has been implemented in generic C code for all
1771 machines. Previous custom assembly implementations of semaphore were
1772 difficult to reason about or ensure that they were safe. The new version
1773 of semaphore supports machines with 64-bit or 32-bit atomic operations.
1774 The new semaphore algorithm is used by sem_init, sem_open, sem_post,
1775 sem_wait, sem_timedwait, sem_trywait, and sem_getvalue.
1777 * Port to Altera Nios II has been contributed by Mentor Graphics.
1779 * Optimized strcpy, stpcpy, strncpy, stpncpy, strcmp, and strncmp
1780 implementations for powerpc64/powerpc64le.
1781 Implemented by Adhemerval Zanella (IBM).
1783 * Added support for TSX lock elision of pthread mutexes on powerpc32, powerpc64
1784 and powerpc64le. This may improve lock scaling of existing programs on
1785 HTM capable systems. The lock elision code is only enabled with
1786 --enable-lock-elision=yes. Also, the TSX lock elision implementation for
1787 powerpc will issue a transaction abort on every syscall to avoid side
1788 effects being visible outside transactions.
1790 * Optimized strcpy, stpcpy, strchrnul and strrchr implementations for
1791 AArch64. Contributed by ARM Ltd.
1793 * i386 memcpy functions optimized with SSE2 unaligned load/store.
1795 * CVE-2104-7817 The wordexp function could ignore the WRDE_NOCMD flag
1796 under certain input conditions resulting in the execution of a shell for
1797 command substitution when the application did not request it. The
1798 implementation now checks WRDE_NOCMD immediately before executing the
1799 shell and returns the error WRDE_CMDSUB as expected.
1801 * CVE-2012-3406 printf-style functions could run into a stack overflow when
1802 processing format strings with a large number of format specifiers.
1804 * CVE-2014-9402 The nss_dns implementation of getnetbyname could run into an
1805 infinite loop if the DNS response contained a PTR record of an unexpected
1808 * The minimum GCC version that can be used to build this version of the GNU
1809 C Library is GCC 4.6. Older GCC versions, and non-GNU compilers, can
1810 still be used to compile programs using the GNU C Library.
1812 * The GNU C Library is now built with -Werror by default. This can be
1813 disabled by configuring with --disable-werror.
1815 * New locales: tu_IN, bh_IN, raj_IN, ce_RU.
1817 * The obsolete sigvec function has been removed. This was the original
1818 4.2BSD interface that inspired the POSIX.1 sigaction interface, which
1819 programs have been using instead for about 25 years. Of course, ABI
1820 compatibility for old binaries using sigvec remains intact.
1822 * Merged gettext 0.19.3 into the intl subdirectory. This fixes building
1823 with newer versions of bison.
1825 * Support for MIPS o32 FPXX, FP64A and FP64 ABI Extensions.
1826 The original MIPS o32 hard-float ABI requires an FPU where double-precision
1827 registers overlay two consecutive single-precision registers. MIPS32R2
1828 introduced a new FPU mode (FR=1) where double-precision registers extend the
1829 corresponding single-precision registers which is incompatible with the
1830 o32 hard-float ABI. The MIPS SIMD ASE and the MIPSR6 architecture both
1831 require the use of FR=1 making a transition necessary. New o32 ABI
1832 extensions enable users to migrate over time from the original o32 ABI
1833 through to the updated o32 FP64 ABI. To achieve this the dynamic linker now
1834 tracks the ABI of any loaded object and verifies that new objects are
1835 compatible. Mode transitions will also be requested as required and
1836 unsupportable objects will be rejected. The ABI checks include both soft and
1837 hard float ABIs for o32, n32 and n64.
1839 GCC 5 with GNU binutils 2.25 onwards:
1840 It is strongly recommended that all o32 system libraries are built using the
1841 new o32 FPXX ABI (-mfpxx) to facilitate the transition as this is compatible
1842 with the original and all new o32 ABI extensions. Configure a MIPS GCC
1843 compiler using --with-fp-32=xx to set this by default.
1847 * The following bugs are resolved with this release:
1849 6804, 9894, 11505, 12994, 13347, 13651, 14308, 14770, 15119, 15132, 15347,
1850 15514, 15698, 15804, 15894, 15946, 16002, 16064, 16095, 16194, 16198,
1851 16275, 16284, 16287, 16315, 16348, 16349, 16354, 16357, 16362, 16447,
1852 16516, 16532, 16539, 16545, 16561, 16562, 16564, 16574, 16599, 16600,
1853 16609, 16610, 16611, 16613, 16619, 16623, 16629, 16632, 16634, 16639,
1854 16642, 16648, 16649, 16670, 16674, 16677, 16680, 16681, 16683, 16689,
1855 16695, 16701, 16706, 16707, 16712, 16713, 16714, 16724, 16731, 16739,
1856 16740, 16743, 16754, 16758, 16759, 16760, 16770, 16786, 16789, 16791,
1857 16796, 16799, 16800, 16815, 16823, 16824, 16831, 16838, 16839, 16849,
1858 16854, 16876, 16877, 16878, 16882, 16885, 16888, 16890, 16892, 16912,
1859 16915, 16916, 16917, 16918, 16922, 16927, 16928, 16932, 16943, 16958,
1860 16965, 16966, 16967, 16977, 16978, 16984, 16990, 16996, 17009, 17022,
1861 17031, 17042, 17048, 17050, 17058, 17061, 17062, 17069, 17075, 17078,
1862 17079, 17084, 17086, 17088, 17092, 17097, 17125, 17135, 17137, 17150,
1863 17153, 17187, 17213, 17259, 17261, 17262, 17263, 17319, 17325, 17354.
1865 * Reverted change of ABI data structures for s390 and s390x:
1866 On s390 and s390x the size of struct ucontext and jmp_buf was increased in
1867 2.19. This change is reverted in 2.20. The introduced 2.19 symbol versions
1868 of getcontext, setjmp, _setjmp, __sigsetjmp, longjmp, _longjmp, siglongjmp
1869 are preserved pointing straight to the same implementation as the old ones.
1870 Given that, new callers will simply provide a too-big buffer to these
1871 functions. Any applications/libraries out there that embed jmp_buf or
1872 ucontext_t in an ABI-relevant data structure that have already been rebuilt
1873 against 2.19 headers will have to rebuilt again. This is necessary in any
1874 case to revert the breakage in their ABI caused by the glibc change.
1876 * Support for file description locks is added to systems running the
1877 Linux kernel. The standard file locking interfaces are extended to
1878 operate on file descriptions, not file descriptors, via the use of
1879 F_OFD_GETLK, F_OFD_SETLK, and F_OFD_SETLKW. File description locks
1880 are associated with an open file instead of a process.
1882 * Optimized strchr implementation for AArch64. Contributed by ARM Ltd.
1884 * The minimum Linux kernel version that this version of the GNU C Library
1885 can be used with is 2.6.32.
1887 * Running the testsuite no longer terminates as soon as a test fails.
1888 Instead, a file tests.sum (xtests.sum from "make xcheck") is generated,
1889 with PASS or FAIL lines for individual tests. A summary of the results is
1890 printed, including a list of failing lists, and "make check" exits with
1891 error status if there were any unexpected failures. "make check
1892 stop-on-test-failure=y" may be used to keep the old behavior.
1894 * The am33 port, which had not worked for several years, has been removed
1897 * The _BSD_SOURCE and _SVID_SOURCE feature test macros are no longer
1898 supported; they now act the same as _DEFAULT_SOURCE (but generate a
1899 warning). Except for cases where _BSD_SOURCE enabled BSD interfaces that
1900 conflicted with POSIX (support for which was removed in 2.19), the
1901 interfaces those macros enabled remain available when compiling with
1902 _GNU_SOURCE defined, with _DEFAULT_SOURCE defined, or without any feature
1903 test macros defined.
1905 * Optimized strcmp implementation for ARMv7. Contributed by ARM Ltd.
1907 * Added support for TX lock elision of pthread mutexes on s390 and s390x.
1908 This may improve lock scaling of existing programs on TX capable systems.
1909 The lock elision code is only built with --enable-lock-elision=yes and
1910 then requires a GCC version supporting the TX builtins. With lock elision
1911 default mutexes are elided via __builtin_tbegin, if the cpu supports
1912 transactions. By default lock elision is not enabled and the elision code
1915 * CVE-2014-4043 The posix_spawn_file_actions_addopen implementation did not
1916 copy the path argument. This allowed programs to cause posix_spawn to
1917 deference a dangling pointer, or use an unexpected pathname argument if
1918 the string was modified after the posix_spawn_file_actions_addopen
1921 * All supported architectures now use the main glibc sysdeps directory
1922 instead of some being in a separate "ports" directory (which was
1923 distributed separately before glibc 2.17).
1925 * The NPTL implementation of POSIX pthreads is no longer an "add-on".
1926 On configurations that support it (all Linux configurations), it's now
1927 used regardless of the --enable-add-ons switch to configure. It is no
1928 longer possible to build such configurations without pthreads support.
1930 * Locale names, including those obtained from environment variables (LANG
1931 and the LC_* variables), are more tightly checked for proper syntax.
1932 setlocale will now fail (with EINVAL) for locale names that are overly
1933 long, contain slashes without starting with a slash, or contain ".." path
1934 components. (CVE-2014-0475) Previously, some valid locale names were
1935 silently replaced with the "C" locale when running in AT_SECURE mode
1936 (e.g., in a SUID program). This is no longer necessary because of the
1939 * On x86-64, the dynamic linker's lazy-binding support is now compatible
1940 with application code using Intel MPX instructions. (With all previous
1941 versions, the MPX register state could be clobbered when making calls
1942 into or out of a shared library.) Note that while the new dynamic
1943 linker is compatible with all known x86 hardware whether or not it
1944 supports Intel MPX, some x86 instruction-set emulators might fail to
1945 handle the new instruction encodings. This is known to affect Valgrind
1946 versions up through 3.9 (but will be fixed in the forthcoming 3.10
1947 release), and might affect other tools that do instruction emulation.
1949 * Support for loadable gconv transliteration modules has been removed.
1950 The support for transliteration modules has been non-functional for
1951 over a decade, and the removal is prompted by security defects. The
1952 normal gconv conversion modules are still supported. Transliteration
1953 with //TRANSLIT is still possible, and the //IGNORE specifier
1954 continues to be supported. (CVE-2014-5119)
1956 * Decoding a crafted input sequence in the character sets IBM933, IBM935,
1957 IBM937, IBM939, IBM1364 could result in an out-of-bounds array read,
1958 resulting a denial-of-service security vulnerability in applications which
1959 use functions related to iconv. (CVE-2014-6040)
1963 * The following bugs are resolved with this release:
1965 156, 387, 431, 762, 832, 926, 2801, 4772, 6786, 6787, 6807, 6810, 6981,
1966 7003, 9721, 9954, 10253, 10278, 11087, 11157, 11214, 12100, 12486, 12751,
1967 12986, 13028, 13982, 13985, 14029, 14032, 14120, 14143, 14155, 14286,
1968 14547, 14699, 14752, 14782, 14876, 14910, 15004, 15048, 15073, 15089,
1969 15128, 15218, 15268, 15277, 15308, 15362, 15374, 15400, 15425, 15427,
1970 15483, 15522, 15531, 15532, 15593, 15601, 15608, 15609, 15610, 15632,
1971 15640, 15670, 15672, 15680, 15681, 15723, 15734, 15735, 15736, 15748,
1972 15749, 15754, 15760, 15763, 15764, 15797, 15799, 15825, 15843, 15844,
1973 15846, 15847, 15849, 15850, 15855, 15856, 15857, 15859, 15867, 15886,
1974 15887, 15890, 15892, 15893, 15895, 15897, 15901, 15905, 15909, 15915,
1975 15917, 15919, 15921, 15923, 15939, 15941, 15948, 15963, 15966, 15968,
1976 15985, 15988, 15997, 16032, 16034, 16036, 16037, 16038, 16041, 16046,
1977 16055, 16071, 16072, 16074, 16077, 16078, 16103, 16112, 16143, 16144,
1978 16146, 16150, 16151, 16153, 16167, 16169, 16172, 16195, 16214, 16245,
1979 16271, 16274, 16283, 16289, 16293, 16314, 16316, 16330, 16337, 16338,
1980 16356, 16365, 16366, 16369, 16372, 16375, 16379, 16381, 16384, 16385,
1981 16386, 16387, 16390, 16394, 16398, 16400, 16407, 16408, 16414, 16430,
1982 16431, 16453, 16474, 16506, 16510, 16529
1984 * Slovenian translations for glibc messages have been contributed by the
1985 Translation Project's Slovenian team of translators.
1987 * The public headers no longer use __unused nor __block. This change is to
1988 support compiling programs that are derived from BSD sources and use
1989 __unused internally, and to support compiling with Clang's -fblock
1990 extension which uses __block.
1992 * CVE-2012-4412 The strcoll implementation caches indices and rules for
1993 large collation sequences to optimize multiple passes. This cache
1994 computation may overflow for large collation sequences and may cause a
1995 stack or buffer overflow. This is now fixed to use a slower algorithm
1996 which does not use a cache if there is an integer overflow.
1998 * CVE-2012-4424 The strcoll implementation uses malloc to cache indices and
1999 rules for large collation sequences to optimize multiple passes and falls
2000 back to alloca if malloc fails, resulting in a possible stack overflow.
2001 The implementation now falls back to an uncached collation sequence lookup
2004 * CVE-2013-4788 The pointer guard used for pointer mangling was not
2005 initialized for static applications resulting in the security feature
2006 being disabled. The pointer guard is now correctly initialized to a
2007 random value for static applications. Existing static applications need
2008 to be recompiled to take advantage of the fix (bug 15754).
2010 * CVE-2013-4237 The readdir_r function could write more than NAME_MAX bytes
2011 to the d_name member of struct dirent, or omit the terminating NUL
2012 character. (Bugzilla #14699).
2014 * CVE-2013-4332 The pvalloc, valloc, memalign, posix_memalign and
2015 aligned_alloc functions could allocate too few bytes or corrupt the
2016 heap when passed very large allocation size values (Bugzilla #15855,
2019 * CVE-2013-4458 Stack overflow in getaddrinfo with large number of results
2020 for AF_INET6 has been fixed (Bugzilla #16072).
2022 * New locales: ak_GH, anp_IN, ar_SS, cmn_TW, hak_TW, lzh_TW, nan_TW, pap_AW,
2023 pap_CW, quz_PE, the_NP.
2025 * Substantially revised locales: gd_GB, ht_HT
2027 * The LC_ADDRESS field was updated to support country_car for almost all
2030 * ISO 1427 definitions were updated.
2032 * ISO 3166 definitions were updated.
2034 * The localedef utility now supports --big-endian and --little-endian
2035 command-line options to generate locales for a different system from that
2036 for which the C library was built.
2038 * Binary locale files now only depend on the endianness of the system for
2039 which they are generated and not on other properties of that system. As a
2040 consequence, binary files generated with new localedef may be incompatible
2041 with old versions of the GNU C Library, and binary files generated with
2042 old localedef may be incompatible with this version of the GNU C Library,
2043 in the following circumstances:
2045 + Locale files may be incompatible on m68k systems.
2047 + Locale archive files (but not separate files for individual locales) may
2048 be incompatible on systems where plain "char" is signed.
2050 * The configure option --disable-versioning has been removed. Builds with
2051 --disable-versioning had not worked for several years.
2053 * ISO 639 definitions were updated for Chiga (cgg) and Chinese (gan, hak, czh,
2054 cjy, lzh, cmn, mnp, cdo, czo, cpx, wuu, hsn, yue).
2056 * SystemTap probes for malloc have been introduced.
2058 * SystemTap probes for slow multiple precision fallback paths of
2059 transcendental functions have been introduced.
2061 * Support for powerpc64le has been added.
2063 * The soft-float powerpc port now supports e500 processors.
2065 * Support for STT_GNU_IFUNC symbols added for ppc32/power4+ and ppc64.
2067 * A new feature test macro _DEFAULT_SOURCE is available to enable the same
2068 set of header declarations that are enabled by default, even when other
2069 feature test macros or compiler options such as -std=c99 would otherwise
2070 disable some of those declarations.
2072 * The _BSD_SOURCE feature test macro no longer enables BSD interfaces that
2073 conflict with POSIX. The libbsd-compat library (which was a dummy library
2074 that did nothing) has also been removed.
2076 * Preliminary documentation about Multi-Thread, Async-Signal and
2077 Async-Cancel Safety has been added.
2079 * Change of ABI data structures for s390 and s390x:
2080 On s390 and s390x the size of struct ucontext and jmp_buf was increased to
2081 allow for future hardware extensions. All library functions that accept or
2082 return these structures were versioned in order to provide backwards
2083 compatibility with existing code. However, not all cases can be handled
2084 with interface versioning. If an application embeds either structure into
2085 another structure and that structure is passed to another compilation unit
2086 which expects the newer larger-sized object then any access to the new
2087 fields will result in undefined behaviour. Similarly any access to fields
2088 that were moved by the enlarging of the structures will cause undefined
2089 behaviour. To fix the undefined behaviour all objects that are part of the
2090 final in-memory image must agree on the size of structures, and this may
2091 require recompilation.
2095 * The following bugs are resolved with this release:
2097 2546, 2560, 5159, 6809, 7006, 10060, 10062, 10283, 10357, 10686, 11120,
2098 11561, 12310, 12387, 12492, 12515, 12723, 13550, 13889, 13951, 13988,
2099 14142, 14176, 14200, 14256, 14280, 14293, 14317, 14327, 14478, 14496,
2100 14582, 14686, 14812, 14888, 14894, 14907, 14908, 14909, 14920, 14941,
2101 14952, 14964, 14981, 14982, 14985, 14991, 14994, 14996, 15000, 15003,
2102 15006, 15007, 15014, 15020, 15022, 15023, 15036, 15054, 15055, 15062,
2103 15078, 15084, 15085, 15086, 15100, 15160, 15214, 15221, 15232, 15234,
2104 15283, 15285, 15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335,
2105 15336, 15337, 15339, 15342, 15346, 15359, 15361, 15366, 15380, 15381,
2106 15394, 15395, 15405, 15406, 15409, 15416, 15418, 15419, 15423, 15424,
2107 15426, 15429, 15431, 15432, 15441, 15442, 15448, 15465, 15480, 15485,
2108 15488, 15490, 15492, 15493, 15497, 15506, 15529, 15536, 15553, 15577,
2109 15583, 15618, 15627, 15631, 15654, 15655, 15666, 15667, 15674, 15711,
2112 * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
2113 has been fixed by disabling the use of pt_chown (Bugzilla #15755).
2114 Distributions can re-enable building and using pt_chown via the new configure
2115 option `--enable-pt_chown'. Enabling the use of pt_chown carries with it
2116 considerable security risks and should only be used if the distribution
2117 understands and accepts the risks.
2119 * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
2122 * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
2123 fixed (Bugzilla #15330).
2125 * Add support for calling C++11 thread_local object destructors on thread
2126 and program exit. This needs compiler support for offloading C++11
2127 destructor calls to glibc.
2129 * Improved worst case performance of libm functions with double inputs and
2132 * Support for priority inherited mutexes in pthread condition variables on
2133 non-x86 architectures.
2135 * Port to Xilinx MicroBlaze contributed by David Holsgrove.
2137 * Optimized string functions for AArch64. Implemented by Marcus Shawcroft.
2139 * Optimized string functions for ARM. Implemented by Will Newton and
2142 * Optimized libm functions for SPARC. Implemented by David S. Miller.
2144 * Support for building more of ARM glibc as Thumb-2 code. Implemented by
2147 * Support for building most of MIPS glibc as MIPS16 code. Implemented by
2148 Chung-Lin Tang, Maciej W. Rozycki and Maxim Kuvyrkov.
2150 * Added a benchmark framework to track performance of functions in glibc.
2152 * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
2153 It is based on draft TS 18661 and currently enabled as a GNU extension.
2155 * On Linux, the clock function now uses the clock_gettime system call
2156 for improved precision, rather than old times system call.
2158 * Added support for version-3 tz format files. This is needed when using
2159 the tz database release 2013e or later, and affects a few unusual cases --
2160 currently only TZ='America/Godthab' for time stamps after 2037.
2162 * Added new API functions pthread_getattr_default_np and
2163 pthread_setattr_default_np to get and set the default pthread
2164 attributes of a process.
2166 * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.
2167 This may improve lock scaling of existing programs on TSX capable systems.
2168 When the --enable-lock-elision=yes parameter is specified at configure
2169 time lock elision will be enabled by default for all PTHREAD_MUTEX_DEFAULT
2172 * Support added for AT_HWCAP2 (to coincide with Linux kernel 3.10
2173 availability). Implemented by Ryan S. Arnold.
2175 * Support added for POWER8 platform. Implemented by Ryan S. Arnold.
2179 * The following bugs are resolved with this release:
2181 1349, 3439, 3479, 3665, 5044, 5246, 5298, 5400, 6530, 6677, 6778, 6808,
2182 9685, 9914, 10014, 10038, 10114, 10191, 10631, 10873, 11438, 11607, 11638,
2183 11741, 12140, 13013, 13412, 13542, 13601, 13603, 13604, 13629, 13679,
2184 13696, 13698, 13717, 13741, 13759, 13761, 13763, 13881, 13939, 13950,
2185 13952, 13966, 14042, 14047, 14090, 14150, 14151, 14152, 14154, 14157,
2186 14166, 14173, 14195, 14197, 14237, 14246, 14251, 14252, 14283, 14298,
2187 14303, 14307, 14328, 14331, 14336, 14337, 14347, 14349, 14368, 14376,
2188 14417, 14447, 14459, 14476, 14477, 14501, 14505, 14510, 14516, 14518,
2189 14519, 14530, 14532, 14538, 14543, 14544, 14545, 14557, 14562, 14568,
2190 14576, 14579, 14583, 14587, 14595, 14602, 14610, 14621, 14638, 14645,
2191 14648, 14652, 14660, 14661, 14669, 14672, 14683, 14694, 14716, 14719,
2192 14743, 14767, 14783, 14784, 14785, 14793, 14796, 14797, 14801, 14803,
2193 14805, 14807, 14811, 14815, 14821, 14822, 14824, 14828, 14831, 14833,
2194 14835, 14838, 14856, 14863, 14865, 14866, 14868, 14869, 14871, 14872,
2195 14879, 14889, 14893, 14898, 14914.
2197 * Optimization of memcpy for MIPS.
2199 * CVE-2011-4609 svc_run() produces high cpu usage when accept fails with
2200 EMFILE has been fixed (Bugzilla #14889).
2202 * The add-on ports collection is now distributed in the "ports" subdirectory
2203 of the main GNU C Library distribution, rather than separately.
2205 * Port to ARM AArch64 contributed by Linaro.
2207 * Support for STT_GNU_IFUNC symbols added for s390 and s390x.
2208 Optimized versions of memcpy, memset, and memcmp added for System z10 and
2210 Implemented by Andreas Krebbel.
2212 * The new function secure_getenv allows secure access to the environment,
2213 returning NULL if running in a SUID/SGID process. This function replaces
2214 the internal function __secure_getenv.
2216 * SystemTap static probes have been added into the dynamic linker.
2217 Implemented by Gary Benson.
2219 * Optimizations of string functions strstr, strcasestr and memmem.
2220 Implemented by Maxim Kuvyrkov.
2222 * The minimum Linux kernel version that this version of the GNU C Library
2223 can be used with is 2.6.16.
2225 * Optimizations of string functions memchr, wcschr, wcscpy, and wcsrchr for
2226 powerpc POWER7. Implemented by Will Schmidt.
2228 * New configure option --disable-nscd builds the C library such that it
2229 never attempts to contact the Name Service Caching Daemon (nscd).
2230 New configure option --disable-build-nscd avoids building nscd itself;
2231 this is the default if --disable-nscd is used.
2233 * Improved support for cross-compilation, including cross-testing and
2234 bootstrap builds without a previously built glibc.
2236 * Several testsuite tests are now able to test multiple IFUNC variants of an
2237 interface, rather than just testing the one that would be chooen by
2240 * New configure options --with-bugurl and --with-pkgversion, for
2241 distributors to use to embed their bug-reporting and package version
2242 information in --help and --version output.
2244 * The ttyname and ttyname_r functions on Linux now fall back to searching for
2245 the tty file descriptor in /dev/pts or /dev if /proc is not available. This
2246 allows creation of chroots without the procfs mounted on /proc.
2248 * The `crypt' function now fails if passed salt bytes that violate the
2249 specification for those values. On Linux, the `crypt' function will
2250 consult /proc/sys/crypto/fips_enabled to determine if "FIPS mode" is
2251 enabled, and fail on encrypted strings using the MD5 or DES algorithm
2252 when the mode is enabled.
2254 * The `clock_*' suite of functions (declared in <time.h>) is now available
2255 directly in the main C library. Previously it was necessary to link with
2256 -lrt to use these functions. This change has the effect that a
2257 single-threaded program that uses a function such as `clock_gettime' (and
2258 is not linked with -lrt) will no longer implicitly load the pthreads
2259 library at runtime and so will not suffer the overheads associated with
2260 multi-thread support in other code such as the C++ runtime library.
2262 * New locales: ayc_PE, doi_IN, ia_FR, mni_IN, nhn_MX, niu_NU, niu_NZ,
2267 * The following bugs are resolved with this release:
2269 174, 208, 350, 369, 411, 706, 766, 2074, 2541, 2547, 2548, 2550, 2551,
2270 2552, 2553, 2554, 2562, 2563, 2565, 2566, 2570, 2576, 2636, 2678, 3335,
2271 3440, 3748, 3768, 3866, 3868, 3906, 3976, 3992, 4026, 4108, 4596, 4822,
2272 5077, 5461, 5805, 5993, 6471, 6486, 6578, 6649, 6730, 6770, 6794, 6884,
2273 6890, 6894, 6895, 6907, 6911, 6959, 7064, 9739, 9902, 10110, 10135, 10140,
2274 10153, 10210, 10254, 10346, 10375, 10545, 10716, 10846, 10882, 11174,
2275 11261, 11322, 11365, 11451, 11494, 11521, 11677, 11837, 11959, 12047,
2276 12097, 12193, 12194, 12297, 12298, 12301, 12340, 12354, 12416, 12495,
2277 13058, 13223, 13361, 13525, 13526, 13527, 13528, 13529, 13530, 13531,
2278 13532, 13533, 13547, 13551, 13552, 13553, 13555, 13556, 13559, 13563,
2279 13566, 13576, 13579, 13583, 13592, 13594, 13613, 13618, 13637, 13656,
2280 13658, 13673, 13691, 13695, 13704, 13705, 13706, 13718, 13726, 13738,
2281 13739, 13743, 13750, 13758, 13760, 13761, 13775, 13786, 13787, 13792,
2282 13806, 13824, 13840, 13841, 13844, 13846, 13848, 13851, 13852, 13854,
2283 13871, 13872, 13873, 13879, 13882, 13883, 13884, 13885, 13886, 13892,
2284 13895, 13908, 13910, 13911, 13912, 13913, 13914, 13915, 13916, 13917,
2285 13918, 13919, 13920, 13921, 13922, 13923, 13924, 13926, 13927, 13928,
2286 13938, 13941, 13942, 13954, 13955, 13956, 13963, 13967, 13968, 13970,
2287 13973, 13979, 13983, 13986, 13996, 14012, 14027, 14033, 14034, 14036,
2288 14040, 14043, 14044, 14048, 14049, 14050, 14053, 14055, 14059, 14064,
2289 14075, 14080, 14083, 14103, 14104, 14109, 14112, 14117, 14122, 14123,
2290 14134, 14153, 14183, 14188, 14199, 14210, 14218, 14229, 14241, 14273,
2293 * Support for the x32 ABI on x86-64 added. The x32 target is selected by
2294 configuring glibc with:
2295 BUILD_CC='gcc' CC='gcc -mx32' CXX='g++ -mx32'
2296 Visit <http://sites.google.com/site/x32abi/> for more x32 ABI info.
2297 Implemented by H.J. Lu.
2301 + define static_assert
2303 + do not declare gets
2305 + declare at_quick_exit and quick_exit also for ISO C11
2307 + aligned_alloc. NB: The code is deliberately allows the size parameter
2308 to not be a multiple of the alignment. This is a moronic requirement
2309 in the standard but it is only a requirement on the caller, not the
2312 + timespec_get added
2314 + uchar.h support added
2316 + CMPLX, CMPLXF, CMPLXL added
2318 Implemented by Ulrich Drepper.
2320 * Support for the IA-64 has been moved to ports.
2322 * Remove support for anything but ELF binary format
2324 * Checking versions of poll, ppoll added.
2325 Implemented by Ulrich Drepper.
2327 * More generic and 64-bit performance optimizations to math functions.
2328 Implemented by Ulrich Drepper.
2330 * New configure option --enable-obsolete-rpc makes the deprecated RPC
2331 headers and functions available at compile time as they were before
2332 version 2.14. This option will be removed at some time in the future
2333 after the TI-RPC library becomes fully sufficient for the needs of
2334 existing applications.
2336 * Compatibility code for Linux kernel versions before 2.4 has been removed.
2337 Note that glibc is not expected to work with any Linux kernel version
2340 * New header <sys/auxv.h> and function getauxval allowing easy access to
2341 the AT_* key-value pairs passed from the Linux kernel. The header also
2342 defines the HWCAP_* bits associated with the AT_HWCAP key.
2344 * New locales: mag_IN
2346 * New configure option --enable-systemtap builds SystemTap static probes
2347 into libc for setjmp and longjmp and into libpthread for various operations.
2348 So far the setjmp/longjmp probes and some of the libpthread probes are
2349 provided only for i*86 and x86_64.
2350 Implemented by Roland McGrath and Rayson Ho.
2352 * Optimized expf for x86-32 and x86-64. Implemented by Liubov Dmitrieva.
2354 * More optimized functions for PowerPC. Implemented by Adhemerval Zanella
2357 * More optimized functions for SPARC. Implemented by David S. Miller.
2359 * Improved support for cross-compilation, especially bootstrap builds
2360 without a previously built glibc.
2362 * Ports for the TILE-Gx and TILEPro families of processors. Contributed by
2363 Chris Metcalf from Tilera.
2365 * Support for the old ARM ABI has been removed from ports. Only the EABI is
2366 now supported for ARM processors.
2368 * The hard-float variant of the ARM EABI now uses /lib/ld-linux-armhf.so.3
2369 as the name of the dynamic linker, to distinguish it from the
2370 /lib/ld-linux.so.3 dynamic linker used for the base EABI.
2372 * Support for CRIS has been removed from ports.
2374 * A new class of installed header has been documented for low-level
2375 platform-specific functionality. PowerPC added the first instance with a
2376 function to provide time base register access. Contributed by Tulio
2377 Magno Quites Machado Filho.
2379 * ix86 configurations now install header files that are consistent with
2380 what x86-64 configurations install. These same header files can be used
2381 for -m32, -m64, or -mx32 builds.
2382 Contributed by H.J. Lu.
2384 * Math library bug fixes. A thorough audit of all open math library bugs was
2385 conducted by Joseph Myers. Significant progress was made on many math
2386 library bugs resulting in more accurate exceptions and function results.
2387 Many thanks to all those that contributed including Andreas Jaeger for his
2388 patch review and work on the x87 trigonometric instruction issues.
2390 * Timezone data is no longer installed. Timezone-related binaries and scripts
2391 will continue to be installed. Users should obtain their timezone data from
2392 their distribution provider or from the tzdata package at
2393 <ftp://munnari.oz.au/pub/>.
2397 * The following bugs are resolved with this release:
2399 6779, 6783, 9696, 10103, 10709, 11589, 11929, 12403, 12786, 12840, 12847,
2400 12868, 12852, 12874, 12885, 12892, 12906, 12907, 12922, 12935, 12962,
2401 13007, 13021, 13061, 13062, 13067, 13068, 13085, 13088, 13090, 13092,
2402 13096, 13114, 13118, 13123, 13134, 13138, 13147, 13150, 13166, 13179,
2403 13185, 13189, 13192, 13268, 13276, 13282, 13291, 13305, 13328, 13335,
2404 13337, 13344, 13358, 13367, 13413, 13416, 13423, 13439, 13446, 13472,
2405 13484, 13506, 13515, 13523, 13524, 13538, 13540
2407 * New program pldd to list loaded object of a process
2408 Implemented by Ulrich Drepper.
2410 * Add nss_db support back to glibc. No more dependency on Berkeley db
2411 and support for initgroups lookups.
2412 Implemented by Ulrich Drepper.
2414 * Optimized strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-32.
2415 Contributed by HJ Lu.
2417 * Improved strcpy, strncpy, stpcpy, stpncpy for SSE2 and SSSE3 on x86-64.
2418 Contributed by HJ Lu.
2420 * Optimized strcat, strncat on x86-64 and optimized wcscmp, wcslen, strnlen
2421 on x86-32 and x86-64.
2422 Contributed by Liubov Dmitrieva.
2424 * Optimized strchr and strrchr for SSE on x86-32.
2425 Contributed by Liubov Dmitrieva.
2427 * Optimized memchr, memrchr, rawmemchr, memcmp, wmemcmp, wcschr, wcscpy
2428 for x86-64 and x86-32.
2429 Contributed by Liubov Dmitrieva.
2431 * New interfaces: scandirat, scandirat64
2432 Implemented by Ulrich Drepper.
2434 * Checking versions of FD_SET, FD_CLR, and FD_ISSET added.
2435 Implemented by Ulrich Drepper.
2437 * nscd now also caches the netgroup database.
2438 Implemented by Ulrich Drepper.
2440 * Integrate libm with gcc's -ffinite-math-only option.
2441 Implemented by Ulrich Drepper.
2443 * Lots of generic, 64-bit, and x86-64-specific performance optimizations
2444 to math functions. Implemented by Ulrich Drepper.
2446 * Optimized strcasecmp and strncasecmp for AVX on x86-64.
2447 Implemented by Ulrich Drepper.
2449 * New Linux interfaces: process_vm_readv, process_vm_writev
2451 * Optimized strcasecmp and strncasecmp for SSSE3 and SSE4.2 on x86-32.
2452 Implemented by Ulrich Drepper.
2454 * Optimized nearbyint and strcasecmp for PPC.
2455 Implemented by Adhemerval Zanella.
2457 * New locales: bho_IN, unm_US, es_CU, ta_LK
2461 * The following bugs are resolved with this release:
2463 386, 6420, 7101, 9730, 9732, 9809, 10138, 10149, 10157, 11099, 11257,
2464 11258, 11487, 11532, 11558, 11578, 11634, 11653, 11668, 11697, 11724,
2465 11781, 11799, 11820, 11837, 11857, 11884, 11892, 11895, 11901, 11945,
2466 11947, 11952, 11987, 12052, 12083, 12158, 12178, 12200, 12346, 12350,
2467 12393, 12420, 12432, 12445, 12449, 12453, 12454, 12460, 12469, 12489,
2468 12509, 12510, 12511, 12518, 12527, 12541, 12545, 12551, 12582, 12583,
2469 12587, 12597, 12601, 12611, 12625, 12626, 12631, 12650, 12653, 12655,
2470 12660, 12671, 12681, 12684, 12685, 12711, 12713, 12714, 12717, 12723,
2471 12724, 12734, 12738, 12746, 12766, 12775, 12777, 12782, 12788, 12792,
2472 12795, 12811, 12813, 12814, 12841
2474 * The RPC implementation in libc is obsoleted. Old programs keep working
2475 but new programs cannot be linked with the routines in libc anymore.
2476 Programs in need of RPC functionality must be linked against TI-RPC.
2477 The TI-RPC implementation is IPv6 enabled and there are other benefits.
2479 Visible changes of this change include (obviously) the inability to link
2480 programs using RPC functions without referencing the TI-RPC library and the
2481 removal of the RPC headers from the glibc headers.
2482 Implemented by Ulrich Drepper.
2484 * New Linux interfaces: clock_adjtime, name_to_handle_at, open_by_handle_at,
2485 syncfs, setns, sendmmsg
2487 * New locales: os_RU, bem_ZA, en_ZA, ff_SN, sw_KE, sw_TZ, lb_LU, wae_CH,
2488 yue_HK, lij_IT, mhr_RU
2490 * New encodings: CP770, CP771, CP772, CP773, CP774
2492 * New program sotruss to trace calls through PLTs
2493 Implemented by Ulrich Drepper.
2495 * The malloc hook implementation is marked deprecated and will be removed
2496 from the default implementation in the next version. The design never
2497 worked ever since the introduction of threads. Even programs which do
2498 not create threads themselves can use multiple threads created internally.
2502 * The following bugs are resolved with this release:
2504 3268, 6812, 7066, 10085, 10484, 10563, 10851, 11149, 11155, 11577, 11611,
2505 11640, 11655, 11701, 11840, 11856, 11883, 11903, 11904, 11968, 11979,
2506 12005, 12037, 12067, 12077, 12078, 12092, 12093, 12107, 12108, 12113,
2507 12140, 12159, 12167, 12191, 12194, 12201, 12204, 12205, 12207, 12348,
2510 * New Linux interfaces: prlimit, prlimit64, fanotify_init, fanotify_mark
2512 * POWER7 optimizations: memset, memcmp, strncmp
2514 * New optimized string functions for x86-64: strnlen (SSE2),
2515 strcasecmp (SSE2, SSSE3, SSE4.2), strncasecmp (SSE2, SSSE3, SSE4.2)
2516 Implemented by Ulrich Drepper.
2520 * The following bugs are resolved with this release:
2522 3662, 4457, 5553, 10162, 10401, 10414, 10554, 10824, 10864, 10915,
2523 10918, 10936, 10939, 10958, 10968, 10969, 10972, 10992, 11000, 11001,
2524 11007, 11010, 11027, 11039, 11040, 11041, 11043, 11046, 11056, 11070,
2525 11093, 11115, 11125, 11126, 11127, 11134, 11141, 11149, 11183, 11184,
2526 11185, 11186, 11187, 11188, 11189, 11190, 11191, 11192, 11193, 11194,
2527 11200, 11230, 11235, 11242, 11254, 11258, 11271, 11272, 11276, 11279,
2528 11287, 11292, 11319, 11332, 11333, 11387, 11389, 11390, 11394, 11397,
2529 11410, 11438, 11449, 11470, 11471, 11520, 11537, 11538, 11571
2531 * New interfaces: pthread_getname_np, pthread_setname_np
2533 * New Linux interface: recvmmsg
2535 * STT_GNU_IFUNC implemented for Sparc by David Miller.
2537 * The dynamic linker now recognizes supported ABI versions from the
2538 EI_ABIVERSION field in the ELF header.
2539 Implemented by Ulrich Drepper.
2541 * New NIS mode selector ADJUNCT_AS_SHADOW. The passwd.adjunct.byname table
2542 will not be used to fill in password fields in the passwd.byname replies.
2543 Instead it is used to synthesize the shadow.byname table, should it be
2544 missing. This is a useful mode in some installations involving Solaris.
2545 Implemented by Ulrich Drepper.
2547 * New locales: kok_IN, sq_MK, cv_RU
2551 * The following bugs are resolved with this release:
2553 3270, 7094, 9924, 9986, 10011, 10085, 10107, 10159, 10162, 10166, 10183,
2554 10195, 10196, 10200, 10203, 10207, 10211, 10213, 10217, 10221, 10229,
2555 10262, 10286, 10312, 10315, 10319, 10349, 10360, 10391, 10402, 10416,
2556 10418, 10422, 10425, 10446, 10448, 10452, 10540, 10553, 10560, 10564,
2557 10609, 10643, 10692, 10713, 10717, 10730, 10731, 10742, 10780, 10784,
2558 10789, 10817, 10823, 10840, 10847
2560 * New interfaces: execvpe, pthread_sigqueue, mkstemps, mkstemps64, mkostemps,
2562 Implemented by Ulrich Drepper.
2564 * Checking version of longjmp added that fails if an uninitialized stack
2565 frame would be created. Implemented by Ulrich Drepper.
2567 * STT_GNU_IFUNC is now supported in static executables.
2568 Implemented by H.J. Lu.
2570 * STT_GNU_IFUNC implemented for PPC by Alan Modra.
2572 * New optimized string functions for x86-64: strstr, strcasestr, memcmp,
2573 strcspn, strpbrk, strspn, strcpy, stpcpy, strncpy, strcmp (SSE2, SSE4.2),
2574 strncmp (SSE2, SSE4.2), strchr (SSE4.2), strrchr (SSE4.2).
2575 Contributed by H.J. Lu.
2577 strlen, rawmemchr, strcmp (SSSE3), strncmp (SSSE3).
2578 Implemented by Ulrich Drepper.
2580 * New optimized string functions for x86: strlen, strcspn, strspn, strpbrk,
2582 Contributed by H.J. Lu.
2584 * Support for fma instruction in AVX on x86-64.
2585 Implemented by H.J. Lu and Ulrich Drepper.
2587 * AVX support in x86-64 auditing support in ld.so.
2588 Implemented by H.J. Lu.
2590 * STB_GNU_UNIQUE support added.
2591 Implemented by Ulrich Drepper.
2593 * Implement second fallback mode for optimized DNS lookup for even more
2594 broken environments. If two requests from the same port are not
2595 handled correctly close the socket and open a new one before sending
2596 the second request. The 'single-request-reopen' option in /etc/resolv.conf
2597 can be used to select this mode right away, instead of rediscovering the
2598 necessity is every process again.
2599 Implemented by Ulrich Drepper.
2601 * New resolver flag RES_USE_DNSSEC to enable use of verified lookup.
2602 Implemented by Adam Tkac.
2604 * Optimized iconv conversions for S390x.
2605 Implemented by Andreas Krebbel.
2607 * Using condvars with PI mutexes is now more efficient due to kernel
2608 support for requeueing to PI futexes. NPTL support added for x86-64.
2609 Implemented by Ulrich Drepper.
2611 * New locales: ps_AF, my_MM
2615 * The following bugs are resolved with this release:
2617 697, 5381, 5807, 6411, 6545, 7040, 7058, 7067, 7080, 7083, 7095, 7098,
2618 9677, 9694, 9697, 9701, 9704, 9705, 9706, 9720, 9726, 9730, 9733, 9736,
2619 9741, 9750, 9753, 9759, 9781, 9791, 9793, 9823, 9833, 9844, 9880, 9881,
2620 9891, 9893, 9895, 9913, 9916, 9920, 9948, 9955, 9957, 9963, 9985, 10052,
2621 10069, 10086, 10087, 10090, 10092, 10093, 10100, 10118, 10128
2623 * New interfaces: preadv, preadv64, pwritev, pwritev64, malloc_info
2624 Implemented by Ulrich Drepper.
2626 * New Linux interfaces: accept4, fallocate, fallocate64.
2627 Implemented by Ulrich Drepper.
2629 * Correct declarations of string function when used in C++ code. This
2630 could lead to compile errors for invalid C++ code.
2632 * XPG7/POSIX 2008 compilation environment. Many GNU-specific functions are
2635 * New POSIX 2008 interface: psiginfo
2636 Implemented by Ulrich Drepper.
2638 * New ISO C++1x interfaces: quick_exit, at_quick_exit
2639 Implemented by Ulrich Drepper.
2641 * Support for selecting between multiple function definitions at runtime
2642 using STT_GNU_IFUNC symbols. Implemented by Ulrich Drepper.
2644 * The libcrypt library can now use the hash function implementations in
2645 NSS. Implemented by Ulrich Drepper.
2647 * The malloc implementation can be compiled to be less memory efficient
2648 but higher performing in multi-threaded programs.
2649 Implemented by Ulrich Drepper.
2651 * New locales: nan_TW@latin, ks_IN
2653 * Faster strlen, strchr, strchrnul, strrchr, memchr, and rawmemchr for x86-64.
2654 Implemented by Ulrich Drepper.
2656 * Extended printf hook support. It is possible to use user-defined types
2657 and extend existing format specifiers.
2658 Implemented by Ulrich Drepper.
2660 * Handling for group shadow files has been added.
2661 Implemented by Ulrich Drepper.
2663 * DNS IPv4-IPv6 parallel lookup now deals better with broken DNS
2664 servers (the case, e.g., for some people using the built-in DNS
2665 server in ADSL modems/routers). There is a once-per-process timeout
2666 in case of a broken server. To avoid it, users can run nscd or put
2667 'options single-request' in /etc/resolv.conf.
2668 Implemented by Ulrich Drepper.
2672 * The following bugs are resolved with this release:
2674 3406, 5209, 5210, 5381, 5794, 5814, 5911, 6428, 6438, 6442, 6447, 6461,
2675 6472, 6505, 6544, 6589, 6612, 6634, 6653, 6654, 6657, 6698, 6712, 6713,
2676 6719, 6723, 6724, 6740, 6763, 6771, 6790, 6791, 6817, 6824, 6839, 6843,
2677 6845, 6856, 6857, 6860, 6867, 6875, 6919, 6920, 6942, 6947, 6955, 6966,
2678 6968, 6974, 6980, 6995, 7008, 7009, 7029
2680 * Unified lookup for getaddrinfo: IPv4 and IPv6 addresses are now looked
2681 up at the same time. Implemented by Ulrich Drepper.
2683 * TLS descriptors for LD and GD on x86 and x86-64.
2684 Implemented by Alexandre Oliva.
2686 * getaddrinfo now handles DCCP and UDPlite.
2687 Implemented by Ulrich Drepper.
2689 * New fixed-size conversion macros: htobe16, htole16, be16toh, le16toh,
2690 htobe32, htole32, be32toh, le32toh, htobe64, htole64, be64toh, le64toh.
2691 Implemented by Ulrich Drepper.
2693 * New implementation of memmem, strstr, and strcasestr which is O(n).
2694 Implemented by Eric Blake.
2696 * New Linux interfaces: inotify_init1, dup3, epoll_create1, pipe2
2698 * Implement "e" option for popen to open file descriptor with the
2699 close-on-exec flag set. Implemented by Ulrich Drepper.
2701 * Implement "b" mode for fmemopen. In this mode writes writes don't
2702 implicitly add a NUL byte and seeks from the end of the buffer really
2703 use the buffer end, not the string length as the basis.
2704 Implemented by Ulrich Drepper.
2706 * Many functions, exported and internal, now atomically set the close-on-exec
2707 flag when run on a sufficiently new kernel. Implemented by Ulrich Drepper.
2709 * Sorting rules for some Indian languages (Kannada, Gurumukhi, Telugu,
2711 Implemented by Pravin Satpute.
2713 * New locales: sd_IN, sd_IN@devanagari, ks_IN@devanagari, ht_HT, en_AG, nl_AW.
2717 * The following bugs are resolved with this release:
2719 2549, 3112, 4314, 4407, 4997, 5012, 5040, 5112, 5204, 5208, 5209, 5220,
2720 5222, 5224, 5225, 5237, 5238, 5240, 5245, 5277, 5346, 5375, 5378, 5382,
2721 5424, 5427, 5428, 5435, 5436, 5439, 5441, 5442, 5443, 5451, 5452, 5454,
2722 5455, 5463, 5464, 5465, 5475, 5477, 5478, 5520, 5541, 5545, 5553, 5600,
2723 5602, 5607, 5614, 5627, 5628, 5736, 5737, 5741, 5753, 5760, 5762, 5768,
2724 5774, 5777, 5778, 5779, 5786, 5790, 5818, 5854, 5857, 5903, 5939, 5979,
2725 5983, 5995, 5998, 6004, 6007, 6020, 6021, 6024, 6040, 6042
2727 * New locales: bo_CN, bo_IN, shs_CA.
2729 * New encoding: HP-ROMAN9, HP-GREEK8, HP-THAI8, HP-TURKISH8.
2731 * Sorting rules for some Indian languages (Devanagari and Gujarati).
2732 Implemented by Pravin Satpute.
2734 * IPV6 addresses in /etc/resolv.conf can now have a scope ID
2736 * nscd caches now all timeouts for DNS entries
2737 Implemented by Ulrich Drepper.
2739 * nscd is more efficient and wakes up less often.
2740 Implemented by Ulrich Drepper.
2742 * More checking functions: asprintf, dprintf, obstack_printf, vasprintf,
2743 vdprintf, and obstack_vprintf.
2744 Implemented by Jakub Jelinek.
2746 * Faster memset for x86-64.
2747 Implemented by Harsha Jagasia and H.J. Lu.
2749 * Faster memcpy on x86.
2750 Implemented by Ulrich Drepper.
2752 * ARG_MAX is not anymore constant on Linux. Use sysconf(_SC_ARG_MAX).
2753 Implemented by Ulrich Drepper.
2755 * Faster sqrt and sqrtf implemention for some PPC variants.
2756 Implemented by Steven Munroe.
2760 * The following bugs are resolved with this release:
2762 4125, 4126, 4178, 4359, 4407, 4512, 4514, 4525, 4554, 4556, 4557, 4566,
2763 4582, 4586, 4588, 4599, 4610, 4647, 4702, 4705, 4726, 4745, 4772, 4773,
2764 4775, 4776, 4792, 4813, 4814, 4816, 4833, 4858, 4860, 4896, 4905, 4925,
2765 4936, 4937, 4938, 4941, 4946, 4963, 4972, 5010, 5028, 5043, 5058, 5063,
2766 5071, 5103, 5104, 5112, 5113, 5184, 5186
2768 * More checking functions: fread, fread_unlocked, open*, mq_open.
2769 Implemented by Jakub Jelinek and Ulrich Drepper.
2771 * Extend fortification to C++. Implemented by Jakub Jelinek.
2773 * Implement 'm' modifier for scanf. Add stricter C99/SUS compliance
2774 by not recognizing 'a' as a modifier when those specs are requested.
2775 Implemented by Jakub Jelinek.
2777 * PPC optimizations to math and string functions.
2778 Implemented by Steven Munroe.
2780 * New interfaces: mkostemp, mkostemp64. Like mkstemp* but allow additional
2781 options to be passed. Implemented by Ulrich Drepper.
2783 * More CPU set manipulation functions. Implemented by Ulrich Drepper.
2785 * New Linux interfaces: signalfd, eventfd, eventfd_read, and eventfd_write.
2786 Implemented by Ulrich Drepper.
2788 * Handle private futexes in the NPTL implementation.
2789 Implemented by Jakub Jelinek and Ulrich Drepper.
2791 * Add support for O_CLOEXEC. Implement in Hurd. Use throughout libc.
2792 Implemented by Roland McGrath and Ulrich Drepper.
2794 * Linux/x86-64 vDSO support. Implemented by Ulrich Drepper.
2796 * SHA-256 and SHA-512 based password encryption.
2797 Implemented by Ulrich Drepper.
2799 * New locales: ber_DZ, ber_MA, en_NG, fil_PH, fur_IT, fy_DE, ha_NG, ig_NG,
2800 ik_CA, iu_CA, li_BE, li_NL, nds_DE, nds_NL, pap_AN, sc_IT, tk_TM, ug_CN,
2803 + New iconv modules: MAC-CENTRALEUROPE, ISO-8859-9E, KOI8-RU.
2804 Implemented by Ulrich Drepper.
2808 * The following bugs are resolved with this release:
2810 3156, 3213, 3285, 3291, 3306, 3313, 3320, 3322, 3325, 3326, 3334, 3348,
2811 3352, 3363, 3369, 3426, 3427, 3429, 3451, 3458, 3465, 3480, 3483, 3493,
2812 3514, 3515, 3559, 3632, 3664, 3673, 3674, 3745, 3747, 3818, 3840, 3842,
2813 3851, 3855, 3884, 3885, 3902, 3905, 3919, 3944, 3954, 3955, 3957, 3991,
2814 3995, 3996, 4024, 4040, 4069, 4070, 4074, 4076, 4096, 4101, 4102, 4114,
2815 4130, 4131, 4181, 4276, 4306, 4342, 4344, 4349, 4364, 4368, 4381, 4392,
2816 4403, 4405, 4406, 4411, 4438, 4439, 4455, 4456, 4465, 4512, 4514, 4586,
2819 * New Linux interfaces: epoll_pwait, sched_getcpu.
2821 * New generic interfaces: strerror_l.
2823 * nscd can now cache the services database. Implemented by Ulrich Drepper.
2827 * The following bugs are resolved with this release:
2829 39, 68, 192, 352, 388, 531, 935, 1006, 1201, 1203, 1386, 1782, 1783, 1784,
2830 1785, 1786, 1787, 1951, 1974, 1996, 2072, 2098, 2125, 2134, 2158, 2182,
2831 2349, 2376, 2386, 2389, 2415, 2418, 2420, 2423, 2450, 2451, 2466, 2472,
2832 2473, 2477, 2498, 2499, 2501, 2502, 2505, 2507, 2508, 2509, 2517, 2526,
2833 2569, 2571, 2592, 2611, 2625, 2632, 2644, 2662, 2680, 2683, 2684, 2693,
2834 2695, 2703, 2734, 2751, 2764, 2766, 2775, 2792, 2821, 2823, 2832, 2841,
2835 2843, 2883, 2892, 2908, 2914, 2926, 2961, 2978, 2980, 2987, 2997, 2998,
2836 3013, 3018, 3034, 3040, 3044, 3123, 3124, 3137, 3138, 3143, 3155, 3189,
2837 3225, 3251, 3252, 3253, 3273
2839 * For Linux, the sorting of addresses returned by getaddrinfo now also
2840 handles rules 3, 4, and 7 from RFC 3484. I.e., all rules are handled.
2841 Implemented by Ulrich Drepper.
2843 * Allow system admin to configure getaddrinfo with the /etc/gai.conf file.
2844 Implemented by Ulrich Drepper.
2846 * New Linux interfaces: splice, tee, sync_file_range, vmsplice.
2848 * New iconv module for MIK. Contributed by Alexander Shopov.
2850 * For sites with broken group and/or passwd database, the auto-propagate
2851 option of nscd can prevent creating ID lookup entries from the results
2852 of a name lookup and vice versa. This usually is no problem but some
2853 site might have problems with the default behavior.
2854 Implemented by Ulrich Drepper.
2856 * Iterating over entire database in NIS can be slow. With the
2857 SETENT_BATCH_READ option in /etc/default/nss a system admin can decide
2858 to trade time for memory. The entire database will be read at once.
2859 Implemented by Ulrich Drepper.
2861 * The interfaces introduced in RFC 3542 have been implemented by
2864 * Support for the new ELF hash table format was added by Ulrich Drepper.
2866 * Support for priority inheritance mutexes added by Jakub Jelinek and
2869 * Support for priority protected mutexes added by Jakub Jelinek.
2871 * New locales: nr_ZA, pa_PK, ca_AD, ca_FR, ca_IT, el_CY, tr_CY, as_IN,
2872 or_IN, csb_PL, fy_NL, sr_ME.
2876 * More overflow detection functions.
2878 * New iconv converters for IBM1025, IBM1122, IBM1137, IBM1153,
2879 IBM1154, IBM1155, IBM1156, IBM1157, and IBM1158 contributed by Jiro Sekiba.
2881 More converters for IBM803, IBM901, IBM902, IBM921, IBM1008, IBM1097,
2882 IBM1112, IBM1123, IBM1130, IBM1140, IBM1141, IBM1142, IBM1143, IBM1144,
2883 IBM1145, IBM1146, IBM1147, IBM1148, IBM1149, IBM1166, IBM1167, IBM4517,
2884 IBM4899, IBM4909, IBM4971, IBM5347, IBM9030, IBM9066, IBM9448, IBM12712,
2885 IBM16804, IBM1364, IBM1371, IBM1388, IBM1390, and IBM1399 contributed
2886 by Masahide Washizawa.
2888 * It is now possible to install audit libraries for the dynamic linker using
2889 LD_AUDIT. Implemented by Ulrich Drepper.
2891 * The LinuxThreads add-on, providing pthreads on Linux 2.4 kernels, is no
2892 longer supported. The new NPTL implementation requires Linux 2.6 kernels.
2893 For a libc and libpthread that works well on Linux 2.4 kernels, we
2894 recommend using the stable 2.3 branch.
2896 * The new function open_wmemstream acts like open_memstream,
2897 but uses a wchar_t wide character buffer.
2899 * The new function ppoll is an improved version of poll, similar to pselect.
2901 * New interfaces: fdopendir, openat, fstatat, fchmodat, fchownat,
2902 futimesat, faccessat, mkdirat, mkfifoat, mknodat,
2903 renameat, unlinkat, linkat, symlinkat, readlinkat.
2905 * New Linux kernel system calls: unshare,
2906 inotify_init, inotify_add_watch, inotify_rm_watch.
2908 * The euidaccess function is now also known by the alias eaccess,
2909 for compatibility with some other systems.
2911 * Timezone data updated to 2006b version.
2915 * The following bugs are resolved with this release:
2917 38, 253, 549, 622, 653, 721, 758, 851, 877, 915, 934, 955, 961,
2918 1016, 1037, 1076, 1079, 1080, 1081, 1082, 1083, 1084, 1085, 1086,
2919 1087, 1088, 1090, 1091, 1092, 1093, 1094, 1095, 1096, 1097, 1098,
2920 1099, 1100, 1101, 1102, 1103, 1104, 1105, 1106, 1107, 1108, 1109,
2921 1110, 1111, 1112, 1113, 1125, 1137, 1138, 1249, 1250, 1251, 1252,
2922 1253, 1254, 1350, 1358, 1394, 1438, 1498, 1534
2924 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2926 * As of this release, GCC 4 can be used to compile the C Library.
2928 * Timezone data updated to 2005m version.
2932 * The following bugs are resolved with this release:
2934 284, 592, 602, 626, 633, 640, 650, 661, 671, 681, 693, 700, 710, 719,
2935 722, 723, 725, 726, 727, 728, 729, 730, 731, 732, 733, 734, 735, 736,
2936 737, 738, 739, 740, 741, 742, 743, 744, 745, 765, 767, 768, 769, 776,
2937 777, 787, 821, 822, 823, 825
2939 Visit <http://sources.redhat.com/bugzilla/> for the details of each bug.
2943 * Support for RFC 3678. Real implementations exist only for Linux so far.
2944 Implemented by Ulrich Drepper.
2946 * nscd can now cache entries persistently. Expiring entries are reloaded.
2947 For speedups the cache can be shared in memory with client processes.
2948 Implemented by Ulrich Drepper.
2950 * nscd can now perform SELinux checks.
2951 Implemented by Matthew Rickard <mjricka@epoch.ncsc.mil>.
2953 * getaddrinfo queries are now cached. Canonical name lookup is performed
2955 Implemented by Ulrich Drepper.
2957 * The nothrow function attribute is used when headers are used by gcc when
2958 compiling C code. This can avoid significant amounts of exception
2961 * The malloc functions perform more error checking and are stricter when
2962 it comes to reacting on errors. The default action is to terminate
2963 the process after showing an error message. Implemented by Ulrich Drepper.
2965 * Reverse lookups of IPv6 addresses does not use bit string or .ip6.int
2966 lookups anymore unless explicitly requested. Implemented by Ulrich Drepper.
2968 * Namespaces in ld.so are implemented. DSOs can be loaded in separate
2969 namespaces using the new function dlmopen(). This feature is of course,
2970 like most other dynamic loading functionality, not available in statically
2971 linked applications. Implemented by Ulrich Drepper.
2973 * Low-overhead boundary checking variants of string and some stdio functions
2974 were added. These are to be used in conjunction with a gcc patch by
2975 Jakub Jelinek which adds calls to these functions if possible.
2976 Implemented by Jakub Jelinek and Ulrich Drepper.
2978 * Old code for several operating systems and machine architectures that
2979 have not been in working condition in a long time have been removed from
2980 the main source tree maintained by the GNU C Library's maintainers.
2981 These files are now reside in the separate `ports' source module
2982 that is usable as an add-on when building the library.
2986 * New functions `dladdr1' and `dlinfo' in <dlfcn.h> provide more ways to
2987 interrogate the dynamic linker, compatible with the Solaris interface.
2989 * ELF thread-local storage support (TLS) now works on PowerPC and PowerPC64;
2990 implemented by Paul Mackerras, Steven Munroe, and Roland McGrath.
2992 * getifaddrs now uses the netlink interface on Linux to get its information.
2993 Implemented by Thorsten Kukuk.
2995 * getaddrinfo now implements AI_V4MAPPED, AI_ALL, and AI_ADDRCONF.
2996 Implemented by Ulrich Drepper.
2998 * support for non-executable stacks on x86 has been added. Changes mostly
3001 * regex is now much faster for multibyte locales. Changes by Jakub Jelinek
3004 * getaddrinfo now performs destination address selection according to
3009 * Thread-safe interfaces for many functions that access locale data
3010 were added in version 2.3, but these features were omitted from NEWS.
3011 Many functions have variants with an `_l' suffix that take a `locale_t'
3012 object as a parameter rather than consulting the current locale.
3013 The new functions `newlocale', `duplocale', and `freelocale' in <locale.h>
3014 create and maintain `locale_t' objects. Additionally, the new function
3015 `uselocale' sets "the current locale" (as used by functions not so
3016 parameterized) set for an individual thread. These features were added
3017 in version 2.3, implemented by Ulrich Drepper and Roland McGrath.
3019 * The functions getresuid, getresgid, setresuid, and setresgid, which
3020 have long been available on Linux, are now declared in <unistd.h>
3021 and are now also available on the Hurd.
3023 * ELF thread-local storage support (TLS) now works on x86-64.
3025 * The new dynamic string token $LIB is expanded in shared library names.
3026 This normally expands to lib, but on some 64-bit platforms to lib64 instead.
3028 * Aldy Hernandez contributed complete software floating point support for
3029 PowerPC machines with no FPU.
3031 * fexecve is implemented on Linux.
3033 * The `btowc' function should work at least twice as fast due to
3034 specialized callbacks in the iconv modules. Implemented by Bruno Haible.
3036 * With approriate thread add-ons cancelable functions are now implemented
3037 in libc.so as well. No need to call the function in libpthread. This
3038 change allowed to finally disable the incorrect and expensive handling
3039 of weak definition in ld.so.
3041 * Yet more PLT entries in libc.so have been removed. We finally arrived
3042 at the bare minimum. Startup times improved appropriately.
3044 * Support for the new Linux/x86 system call interface was added. The
3045 AT_SYSINFO auxiliary vector entry is recognized and handled.
3049 * Masahide Washizawa contributed iconv modules for IBM1163 and IBM1164
3052 * iconv (the program and the interface) now accepts empty names (excluding
3053 options like //TRANSLIT) to mean "use charset of current locale".
3055 * localedef can now transliterate characters in strings which are not in
3056 the provided charmap. The information from the input locale is used.
3058 * Prelinking support was added for ELF targets. This requires additional
3059 tools and recent versions of the GNU binutils. Contributed by Jakub Jelinek.
3061 * Read-only stdio streams now use mmap to speed up operation by eliminating
3062 copying and buffer underflows. To use add 'm' to the mode string of
3063 the fopen/fdopen/freopen call. Implemented by Ulrich Drepper.
3065 * The malloc functions were completely rewritten by Wolfram Gloger based
3066 on Doug Lea's malloc-2.7.0.c.
3068 * Isamu Hasegawa contributed a completely new and POSIX-conformant
3069 implementation of regex.
3071 * Bruno Haible upgraded the iconv and locale implementation to support
3074 * Contents of the LC_* and LANG environment variables in the CEN style are
3075 not recognized anymore. It never was used. Change by Ulrich Drepper.
3077 * The runtime (ld.so, libc, libpthread for Linux) now can handle the ELF
3078 thread-local storage (TLS) ABI on some platforms.
3079 Changes by Ulrich Drepper. SH support by Kaz Kojima.
3081 * Bruno Haible contributed iconv converters for ISO-2022-JP-3, SHIFT JIS-X0213,
3082 EUC-JISX0213, and TSCII.
3084 * New header <ifaddrs.h> with functions `getifaddrs' and `freeifaddrs':
3085 BSD-compatible interface for getting all network interface addresses.
3086 Implementation for IPv4 by Roland McGrath.
3088 * Loading of locale data is faster due to the introduction of a locale
3089 archive. Implemented by Roland McGrath and Ulrich Drepper.
3091 * Startup times are significantly reduced by not using exported functions
3092 inside the library itself. Changes by Jakub Jelinek, Roland McGrath,
3095 * Steven Munroe contributed a port to PowerPC64/Linux.
3099 * The Hurd now uses the GNU libio implementation of stdio rather than the
3100 old GNU stdio implementation, and uses a new ABI (libc.so.0.3).
3102 * The Hurd on x86 now has the `ioperm' function and <sys/io.h> header file
3103 with the same behavior as the Linux system call of the same name.
3107 * Stephen Moshier implemented log2, log10, powl and cbrtl for the
3108 128-bit long double format.
3110 * Masahide Washizawa contributed iconv modules for IBM1132, IBM1133, IBM1160,
3111 IBM1161, and IBM1162 charsets.
3113 * Andreas Jaeger contributed a port to x86-64/Linux.
3115 * Peter Bruin contributed a port to PowerPC/Hurd.
3117 * libc functions using I/O streams now can handle wide-oriented streams
3120 * optimizations in the dynamic linker. Binaries created by recent binutils
3121 versions start up quicker due to reduced time spent on relocations.
3123 * Support for use of gcc3 added by Jakub Jelinek and HJ Lu.
3127 * Stephen Moshier implemented cosh, expm1, log1p, acos, sinh, tanh,
3128 asinh, atanh, j0 for the 128-bit long double format.
3130 * Bruno Haible updated all the code handling Unicode in some form to
3131 support Unicode 3.1.
3133 * Speed of regex for single-byte locales is back to previous levels.
3134 Patch by Isamu Hasegawa.
3136 * Alpha, SPARC, and IA-64 now also using floating stacks.
3138 * Startup time of internationalized applications greatly improved through
3139 iconv cache. Use iconvconfig to generate the cache file.
3140 Contributed by Ulrich Drepper.
3142 * The IA-64 specific part of ld.so was rewritten to eliminate some pretty
3143 severe performance problems. Patch by David Mosberger.
3145 * The Hurd port got a lot more functionality like AIO, various stdio
3146 extensions, etc. Mainly done by Roland McGrath.
3148 * mtrace can now lookup symbols in shared libraries.
3152 * Intel's IA-64 math library is largely integrated. It provides fast and
3153 accurate implementatations for most basic and standard math functions
3154 in float, double, and long double format.
3156 * Stephen Moshier implemented j0, j1, jn, y0, y1, yn, lgamma, erf, erfc,
3157 and asin for the 96-bit long double format and asin, log, tan for the
3158 128-bit long double format.
3160 * The beginning of a last-bit accurate math library by IBM Haifa were added.
3161 The basic double functions exist today. Contributed by Abraham Ziv
3162 <ziv@il.ibm.com>, Moshe Olshansky <olshansk@il.ibm.com>, Ealan Henis
3163 <ealan@il.ibm.com>, and Anna Reitman <reitman@il.ibm.com>.
3165 * An asynchronous name lookup library was added. The interface is designed
3166 after POSIX AIO. The proposal was circulated beforehand to get comments.
3167 No negative ones came in. Implemented by Ulrich Drepper.
3169 * Port to S390/64bit contributed by Martin Schwidefsky
3170 <schwidefsky@de.ibm.com>.
3172 * David Mosberger <davidm@hpl.hp.com> implemented the setcontext family
3173 of functions for Linux/IA-64.
3175 * The RPC code is now thread safe. Threads can now use the same service
3176 of different services at the same time. Patch by Eric Norum
3177 <eric.norum@usask.ca> with some help by Ulrich Drepper.
3179 * Martin Schwidefsky <schwidefsky@de.ibm.com> implemented the setcontext
3180 family of functions for Linux/S390.
3182 * Ulrich Drepper <drepper@redhat.com> implemented the setcontext family
3183 of functions for Linux/x86.
3185 * Port to Linux/CRIS contributed by Axis Communications.
3189 * Lots of headers were cleaned up. Using the tool in the conform/ subdir
3190 we can now check for namespace violations and missing declarations. The
3191 result is that almost all headers are now Unix-compliant (as defined in
3192 the upcoming XPG6). The negative side is that some programs might need
3193 corrections, too, if they depend on the incorrect form of the headers in
3194 previous versions which defined too many symbols and included too many
3197 * regex now handles multibyte character sets correctly.
3198 Contributed by Isamu Hasegawa <isamu@yamato.ibm.com>.
3200 * iconv (the program) does now conform to the upcoming XPG6 and handles
3201 charmaps. Instead of the charset names the path of charmaps can be
3202 provided and the conversion happens based on this data.
3203 Contributed by Ulrich Drepper.
3205 * The locale program now provides detailed information about the installed
3210 only lists the names of the supported locales
3214 provides details such as country, language, and codeset name.
3215 Contributed by Ulrich Drepper.
3219 * The gencat program now parses the input file according to the charset
3220 selected by the LC_CTYPE category. This is important for stateful
3221 character sets. To make generating catalogs easier there is a way
3222 to overwrite the charset selected by the locale: before the first
3223 message or $ quote line the catalog can contain a line like
3225 $ codeset=ISO-8859-2
3227 to select the charset (ISO-8859-2 in this case).
3229 Implemented by Shinya Hanataka and Ulrich Drepper.
3231 * New codeset conversion modules: IBM-922 (Estonia PC codeset),
3232 IBM-1124 (Ukraine PC codeset), IBM-1129 (Vietnamese PC codeset).
3233 Contributed by Masahide Washizawa <washi@jp.ibm.com>.
3235 * Optimized string functions for Alpha ev6 and ev67 by Richard Henderson
3236 <rth@redhat.com> and Rick Gorton <rick.gorton@alpha-processor.com>.
3238 * The LANGUAGE environment variable is now ignored unless the locale is
3239 changed from the default "C" locale.
3241 * The usual bug fixes.
3245 * Greg McGary added runtime support for bounds checking using gcc's
3246 new -fbounded-pointers option. ix86 target is complete. PowerPC
3249 * Thorsten Kukuk added secure mode support to nscd.
3251 * The Berkeley db libraries have been removed.
3253 Related, the nss_db module is now in a separate package since it
3254 obviously requires a database library being available.
3256 * Wide character I/O streams implemented by Ulrich Drepper.
3258 * Functions from the extended socket API added by Ulrich Drepper.
3260 * Functions feenableexcept and fedisableexcept to control the
3261 behaviour of individual exceptions have been added by Andreas Jaeger.
3263 * ldconfig program added by Andreas Jaeger and Jakub Jelinek.
3265 * The resolver code has been updated from bind 8.2.3-T5B which supports
3266 threads. The integration was done by Andreas Jaeger, Adam D. Bradley,
3269 This change could in some situations effect backward compatibility. Since
3270 now `_res' is a thread-local instead of a global variable, modifying it
3271 in one thread does not have any effect in other threads.
3273 The resolver library was also extended to allow IPv6 as the transport
3274 protocol for the requests. This work was done by Stig Venaas.
3276 * Compatibility code for K&R C compilers has been removed from the
3277 header files. A ISO C compiler is needed to use the library
3278 (conforming to either C89 or C99 standard).
3280 * Complete rewrite of the localedef program to support multibyte character
3281 sets. Implement handling of ISO 14651 and ISO 14652. Rewrite strcoll,
3282 strxfrm, wcscoll, and wcsxfrm functions. Make isw*() functions work.
3283 Implemented by Ulrich Drepper.
3285 Bruno Haible significantly improved the generation and use of the data
3286 structures for the wide character tables.
3288 * Plural handling in gettext implemented by Ulrich Drepper.
3290 * The utmp daemon has been removed.
3292 * The port to MIPS-Linux has been finished by Andreas Jaeger.
3294 * A port to Hitachi SH3 and SH4 has been contributed by Kazumoto Kojima
3297 * POSIX clocks and timers implemented by Kaz Kylheku and Ulrich Drepper.
3299 * POSIX barriers implemented by Kaz Kylheku.
3301 * POSIX spawn function family implemented by Ulrich Drepper.
3303 * POSIX spinlocks are now available.
3305 * Timed wait functions for mutex, rwlock, and semaphores are implemented.
3307 * the configure option --enable-kernel=X.Y.Z allows to strip out
3308 compatibility for kernel versions before X.Y.Z. This is currently only
3309 implemented for Linux.
3311 * the sockaddr_in6 structure changed. The IPv6 working group added a new
3312 field sin6_scope_id. This means that all programs using IPv6 should be
3313 recompiled. Don't expect binary compatibility with previous glibc
3316 * various conversion modules for IBM character sets contributed by
3319 * IA-64 port by Jes Sorensen and HJ Lu.
3333 * New ISO C 9x function _Exit, imaxabs, and imaxdiv are added.
3335 * New xdr functions are added; some rpc functions are now 64bit clean.
3337 * Fixed a number of bugs and memory leaks (especially in NIS+ code).
3339 * Fixed known incompatibilities with glibc 2.0.
3341 * New functions lock64, strchrnul, rawmemchr, getutmp and getutmpx.
3343 * Optimized a number of functions (especially the ELF dynamic loader).
3345 * Update timezone data files.
3347 * lots of charmaps corrections
3349 * some new locale definitions and charmaps
3354 * Richard Henderson corrected size of struct timeval on Linux/Alpha to
3355 conform to POSIX member type requirements. Symbol versions have been
3356 adjusted as needed within the library, and for direct use by applications,
3357 but there is potential for problems if third-party libraries use
3358 struct timeval as part of their interface. This does not present
3359 a problem for X and other "essential" system libraries.
3361 * An additional locale model to support C++ Standard Library locale
3362 model and probably more was implemented by Ulrich Drepper.
3364 * Eric Youngdale and Ulrich Drepper implemented versioning of objects on
3367 * Miles Bader provided the `argp' function family to support hierachical
3368 command line argument parsing, layered on top of getopt.
3370 * strtod accepts new hexadecimal floating-point format from ISO C 9X.
3372 * printf has two new specifiers %a and %A to print hexadecimal flaoting-point
3375 * scanf recognizes the %a and %A format for scanning floating point numbers.
3377 * the new headers <stdint.h> and <inttypes.h> from ISO C 9X provides
3378 information and interfaces for the available integer types.
3380 * about 130 new math functions were added to implement the ISO C9x math
3383 * the new header <complex.h> contains definitions of the complex math
3384 functions from ISO C 9X.
3386 * the new header <tgmath.h> defines generic macros to use complex or
3387 real valued functions.
3389 * Thorsten Kukuk provided an implementation for NIS+, securelevel 0, 1 and 2.
3391 * Andreas Jaeger provided a test suite for the math library.
3393 * Mark Kettenis implemented the utmpx interface and an utmp daemon.
3395 * Ulrich Drepper added character set conversion functions (iconv).
3397 * Optimized string functions have been added.
3399 * The localedata addon is now part of glibc.
3401 * An implementation of profiling shared libraries was added by Ulrich Drepper.
3403 * Thorsten Kukuk and Ulrich Drepper provided an implementation for a caching
3404 daemon for NSS (nscd).
3406 Missing a better place here are some numbers on improvements. Under
3407 Linux 2.1.125 un-tar-ing the kernel sources takes
3411 using local files 12.19s 6.88s 22.91s
3413 using NIS 13.92s 8.91s 26.34s
3415 using NIS & nscd 10.37s 7.34s 25.30s
3417 using NIS+ 27.57s 30.37s 640.46s
3419 using NIS+ & nscd 10.25s 7.83s 26.51s
3421 using NIS & old nscd [1] 13.83s 8.32s 29.60s
3423 Keep in mind that non-namelookup related operations dominate above times.
3424 It was just a common complain that using NIS+ unpacking the kernel is
3427 [1] The old nscd implementation is not available anymore since it was
3428 distributed with glibc up to version 2.0.98 and thus is now replaced.
3430 * Tim Waugh provided an implementation of the POSIX.2 wordexp function family.
3432 * Mark Kettenis provided a Hesiod NSS module.
3434 * The ELF dynamic loader knows how to process dynamic string tokens ($ORIGIN
3435 and $PLATFORM) in RPATHs and similar strings (Ulrich Drepper).
3437 * rcmd can now handle netgroups (Dick Streefland).
3439 * A port to the ARM was contributed by Phil Blundell, Pat Beirne and Scott
3442 * Support for the IPv6 protocol has been added to the socket API, as per the
3443 latest draft standards.
3445 * Support for Linux 2.2 has been added.
3447 * Interface changes relative to the latest 2.0.x release:
3448 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3449 addseverity NEW: Unix98
3450 alphasort64 NEW: LFS
3451 argp_err_exit_status NEW: argp, GNU ext
3452 argp_error NEW: argp, GNU ext
3453 argp_failure NEW: argp, GNU ext
3454 argp_help NEW: argp, GNU ext
3455 argp_parse NEW: argp, GNU ext
3456 argp_program_bug_address NEW: argp, GNU ext
3457 argp_program_version NEW: argp, GNU ext
3458 argp_program_version_hook NEW: argp, GNU ext
3459 argp_state_help NEW: argp, GNU ext
3460 argp_usage NEW: argp, GNU ext
3461 authdes_create NEW: Secure RPC
3462 authdes_getucred NEW: Secure RPC
3463 authdes_pk_create NEW: Secure RPC
3464 backtrace NEW: GNU ext.
3465 backtrace_symbols NEW: GNU ext.
3466 backtrace_symbols_fd NEW: GNU ext.
3468 cacosf NEW: ISO C 9x
3469 cacosh NEW: ISO C 9x
3470 cacoshf NEW: ISO C 9x
3471 cacoshl NEW: ISO C 9x
3472 cacosl NEW: ISO C 9x
3479 casinf NEW: ISO C 9x
3480 casinh NEW: ISO C 9x
3481 casinhf NEW: ISO C 9x
3482 casinhl NEW: ISO C 9x
3483 casinl NEW: ISO C 9x
3485 catanf NEW: ISO C 9x
3486 catanh NEW: ISO C 9x
3487 catanhf NEW: ISO C 9x
3488 catanhl NEW: ISO C 9x
3489 catanl NEW: ISO C 9x
3490 cbc_crypt NEW: Secure RPC
3494 ccoshf NEW: ISO C 9x
3495 ccoshl NEW: ISO C 9x
3501 cimagf NEW: ISO C 9x
3502 cimagl NEW: ISO C 9x
3503 clearerr_locked REMOVED
3504 clntunix_create NEW: sunrpc ext
3506 clog10 NEW: ISO C 9x
3507 clog10f NEW: ISO C 9x
3508 clog10l NEW: ISO C 9x
3518 cprojf NEW: ISO C 9x
3519 cprojl NEW: ISO C 9x
3521 crealf NEW: ISO C 9x
3522 creall NEW: ISO C 9x
3527 csinhf NEW: ISO C 9x
3528 csinhl NEW: ISO C 9x
3531 csqrtf NEW: ISO C 9x
3532 csqrtl NEW: ISO C 9x
3536 ctanhf NEW: ISO C 9x
3537 ctanhl NEW: ISO C 9x
3539 des_setparity NEW: Secure RPC
3540 ecb_crypt NEW: Secure RPC
3541 endutxent NEW: Unix98
3543 exp10f NEW: ISO C 9x
3544 exp10l NEW: ISO C 9x
3548 fattach NEW: STREAMS
3549 fdetach NEW: STREAMS
3553 feclearexcept NEW: ISO C 9x
3554 fegetenv NEW: ISO C 9x
3555 fegetexceptflag NEW: ISO C 9x
3556 fegetround NEW: ISO C 9x
3557 feholdexcept NEW: ISO C 9x
3559 feraiseexcept NEW: ISO C 9x
3560 ferror_locked REMOVED
3561 fesetenv NEW: ISO C 9x
3562 fesetexceptflag NEW: ISO C 9x
3563 fesetround NEW: ISO C 9x
3564 fetestexcept NEW: ISO C 9x
3565 feupdateenv NEW: ISO C 9x
3566 fflush_locked REMOVED
3570 fgets_unlocked NEW: GNU ext.
3571 fileno_locked REMOVED
3583 fputc_locked REMOVED
3584 fputs_unlocked NEW: GNU ext.
3585 fread_unlocked NEW: GNU ext.
3590 fstatvfs NEW: Unix98
3594 ftruncate64 NEW: LFS
3596 fwrite_unlocked NEW: GNU ext.
3597 gai_strerror NEW: IPv6
3601 getchar_locked REMOVED
3603 getdate_err NEW: Unix98
3604 getdate_r NEW: GNU ext.
3606 getnameinfo NEW: IPv6
3607 getnetname NEW: Secure RPC
3608 getpmsg NEW: STREAMS
3609 getpt NEW: Unix98 PTY
3610 getrlimit64 NEW: LFS
3611 getutxent NEW: Unix98
3612 getutxid NEW: Unix98
3613 getutxline NEW: Unix98
3614 glob64 NEW: GNU ext.
3615 globfree64 NEW: GNU ext.
3616 gnu_get_libc_release NEW: GNU ext.
3617 gnu_get_libc_version NEW: GNU ext.
3618 grantpt NEW: Unix98 PTY
3619 host2netname NEW: Secure RPC
3621 iconv_close NEW: iconv
3622 iconv_open NEW: iconv
3623 if_freenameindex NEW: IPv6
3624 if_indextoname NEW: IPv6
3625 if_nameindex NEW: IPv6
3626 if_nametoindex NEW: IPv6
3627 in6addr_any NEW: IPv6
3628 in6addr_loopback NEW: IPv6
3629 inet6_isipv4mapped NEW: IPv6
3630 isastream NEW: STREAMS
3631 iswblank NEW: GNU ext.
3632 key_decryptsession NEW: Secure RPC
3633 key_decryptsession_pk NEW: Secure RPC
3634 key_encryptsession NEW: Secure RPC
3635 key_encryptsession_pk NEW: Secure RPC
3636 key_gendes NEW: Secure RPC
3637 key_get_conv NEW: Secure RPC
3638 key_secretkey_is_set NEW: Secure RPC
3639 key_setnet NEW: Secure RPC
3640 key_setsecret NEW: Secure RPC
3641 llrint NEW: ISO C 9x
3642 llrintf NEW: ISO C 9x
3643 llrintl NEW: ISO C 9x
3644 llround NEW: ISO C 9x
3645 llroundf NEW: ISO C 9x
3646 llroundl NEW: ISO C 9x
3651 lrintf NEW: ISO C 9x
3652 lrintl NEW: ISO C 9x
3653 lround NEW: ISO C 9x
3654 lroundf NEW: ISO C 9x
3655 lroundl NEW: ISO C 9x
3657 makecontext NEW: Unix98
3658 mempcpy NEW: GNU ext.
3661 modify_ldt NEW: kernel
3665 nearbyint NEW: ISO C 9x
3666 nearbyintf NEW: ISO C 9x
3667 nearbyintl NEW: ISO C 9x
3668 netname2host NEW: Secure RPC
3669 netname2user NEW: Secure RPC
3670 nexttoward NEW: ISO C 9x
3671 nexttowardf NEW: ISO C 9x
3672 nexttowardl NEW: ISO C 9x
3676 passwd2des NEW: Secure RPC
3678 pow10f NEW: GNU ext.
3679 pow10l NEW: GNU ext.
3682 printf_size NEW: GNU ext.
3683 printf_size_info NEW: GNU ext.
3684 profil_counter REMOVED
3685 pthread_mutexattr_getkind_np REPLACED
3686 pthread_mutexattr_setkind_np REPLACED
3687 ptsname NEW: Unix98 PTY
3688 ptsname_r NEW: Unix98 PTY
3690 putchar_locked REMOVED
3691 putgrent NEW: GNU ext.
3693 putpmsg NEW: STREAMS
3694 pututxline NEW: Unix98
3698 readdir64_r NEW: LFS
3699 remquo NEW: ISO C 9x
3700 remquof NEW: ISO C 9x
3701 remquol NEW: ISO C 9x
3703 roundf NEW: ISO C 9x
3704 roundl NEW: ISO C 9x
3706 scalbln NEW: ISO C 9x
3707 scalblnf NEW: ISO C 9x
3708 scalblnl NEW: ISO C 9x
3710 sendfile NEW: kernel
3711 setcontext NEW: Unix98
3712 setrlimit64 NEW: LFS
3713 setutxent NEW: Unix98
3715 sigignore NEW: Unix98
3716 sigqueue NEW: POSIX.1b
3717 sigrelse NEW: Unix98
3718 sigset NEW: POSIX.1b
3719 sigtimedwait NEW: POSIX.1b
3720 sigwaitinfo NEW: POSIX.1b
3721 sincos NEW: GNU ext.
3722 sincosf NEW: GNU ext.
3723 sincosl NEW: GNU ext.
3727 strcasestr NEW: GNU ext.
3728 strtoimax NEW: ISO C 9x
3729 strtoumax NEW: ISO C 9x
3730 strverscmp NEW: GNU ext.
3731 svcauthdes_stats NEW: Secure RPC
3732 svcunix_create NEW: sunrpc etx
3733 svcunixfd_create NEW: sunrpc ext
3734 swapcontext NEW: Unix98
3735 tcgetsid NEW: Unix98 PTY
3736 tdestroy NEW: GNU ext.
3737 tgamma NEW: ISO C 9x
3738 tgammaf NEW: ISO C 9x
3739 tgammal NEW: ISO C 9x
3743 truncf NEW: ISO C 9x
3744 truncl NEW: ISO C 9x
3746 unlockpt NEW: Unix98 PTY
3747 updwtmpx NEW: Unix98
3748 user2netname NEW: Secure RPC
3749 utmpxname NEW: Unix98
3750 versionsort NEW: GNU ext.
3751 versionsort64 NEW: GNU ext.
3753 wcscasecmp NEW: GNU ext.
3754 wcsncasecmp NEW: GNU ext.
3755 wcsnlen NEW: GNU ext.
3756 wcstoimax NEW: ISO C 9x
3757 wcstoll NEW: ISO C 9x
3758 wcstoull NEW: ISO C 9x
3759 wcstoumax NEW: ISO C 9x
3761 wordexp NEW: POSIX.2
3762 wordfree NEW: POSIX.2
3763 write_profiling REMOVED
3764 xdecrypt NEW: Secure RPC
3765 xdr_authdes_cred NEW: Secure RPC
3766 xdr_authdes_verf NEW: Secure RPC
3767 xdr_cryptkeyarg NEW: Secure RPC
3768 xdr_cryptkeyarg2 NEW: Secure RPC
3769 xdr_cryptkeyres NEW: Secure RPC
3770 xdr_getcredres NEW: Secure RPC
3771 xdr_key_netstarg NEW: Secure RPC
3772 xdr_key_netstres NEW: Secure RPC
3773 xdr_keybuf NEW: Secure RPC
3774 xdr_keystatus NEW: Secure RPC
3775 xdr_netnamestr NEW: Secure RPC
3776 xdr_sizeof NEW: Secure RPC
3777 xdr_unixcred NEW: sunrpc ext
3778 xencrypt NEW: Secure RPC
3779 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
3790 * inet_ntoa is thread-safe
3792 * updwtmp is moved from libutil to libc
3794 * rewrite of cbrt function
3796 * update of timezone data
3810 * add atoll function
3812 * fix complex problems in Berkeley DB code
3814 * fix math functions
3818 * fixed lots of header problems (especially Linux/GNU specific)
3820 * dynamic loader preserves all registers
3822 * Roland McGrath provided support for handling of auxiliary objects in
3823 the ELF dynamic loader.
3825 * support for parallel builds is improved
3829 * GNU extensions are no longer declared by default. To enable them you
3830 must define the macro `_GNU_SOURCE' in your program or compile with
3833 * The library has changed from using GNU ld symbol aliases to using weak
3834 symbols where available. The ELF object file format supports weak
3835 symbols; GNU ld also supports weak symbols in the a.out format. (There
3836 is also now support for other GNU ld extensions in ELF. Use the
3837 `--with-elf' option to configure to indicate you have ELF, and
3838 `--with-gnu-ld' if using GNU ld.) This change resulted in the deletion
3839 of many files which contained only symbol aliases, reducing the size of
3840 the source and the compiled library; many other files were renamed to
3841 less cryptic names previously occupied by the symbol alias files.
3842 There is a new header file <elf.h> for programs which operate on
3843 files in the ELF format.
3845 * Converted to Autoconf version 2, so `configure' has more options.
3846 Run `configure --help' to see the details.
3848 * The library can now be configured to build profiling, highly-optimized
3849 (but undebuggable), and/or shared libraries (ELF with GNU ld only). The
3850 `--enable-profile', `--enable-omitfp', and `--enable-shared' options to
3851 `configure' enable building these extra libraries. The shared library is
3852 built by default when using both ELF and GNU ld. When shared libraries
3853 are enabled, the new library `-ldl' is available for arbitrary run-time
3854 loading of shared objects; its interface is defined in <dlfcn.h>. The
3855 new header file <link.h> gives access to the internals of the run-time
3856 dynamic linker, `ld.so'. The shell script `ldd' is similar to the
3857 application of same name on other systems and it provides information
3858 about dynamically linked binaries.
3860 * The C library now provides the run-time support code for profiling
3861 executables compiled with `-pg'. Programs can control the profiling code
3862 through the interface in <sys/gmon.h>. The `gmon.out' files written by
3863 the GNU C library can be read only by GNU `gprof' (from GNU binutils);
3864 the support for this file format was contributed by David Mosberger-Tang.
3866 * The math code has been replaced with a math library based on fdlibm from
3867 Sun, and modified by JT Conklin and Ulrich Drepper with i387 support, by
3868 Ian Taylor with `float' functions and by Ulrich Drepper with `long double'
3869 functions. The math functions now reside in a separate library, so
3870 programs using them will need to use `-lm' their linking commands.
3872 * John C. Bowman contributed optimized ix87 assembler inline functions.
3874 * Ulrich Drepper has contributed support for an `/etc/nsswitch.conf'
3875 mechanism similar to that found in Solaris 2. This is now used for the
3876 group, passwd, hosts, networks, services, protocols, rpc, ethers,
3877 shadow, netgroup, publickey, and alias databases. The `nsswitch.conf'
3878 file controls what services are used for each individual database. This
3879 works by loading shared libraries with names specified in `nsswitch.conf',
3880 so service modules can be changed or added at any time without even
3881 relinking any program. Currently there are the file, db, and NIS based
3882 NSS services available.
3884 * The new functions `strtoq' and `strtouq' parse integer values from
3885 strings, like `strtol' and `strtoul', but they return `long long int' and
3886 `unsigned long long int' values, respectively (64-bit quantities).
3888 * The new functions `strtof' and `strtold' parse floating-point values from
3889 strings, like `strtod', but they return `float' and `long double' values,
3890 respectively (on some machines `double' and `long double' are the same).
3892 * Ulrich Drepper has contributed new implementations of the floating-point
3893 printing and reading code used in the `printf' family of functions and
3894 `strtod', `strtof', and `strtold'. These new functions are perfectly
3895 accurate, and much faster than the old ones.
3897 * The implementation of the POSIX locale model was completely rewritten by
3898 Ulrich Drepper. This includes the new programs `localedef' and `locale'
3899 to compile the POSIX locale definition.
3901 * The former dummy implementations of the strcoll and strxfrm function are
3902 now replaced by fully functional code contributed by Ulrich Drepper. The
3903 collation information comes from the POSIX locale definitions.
3905 * The new header <langinfo.h> defines an interface for accessing
3906 various locale-dependent data (using the locale chosen with `setlocale').
3908 * Ulrich Drepper has contributed a new suite of functions for operation on
3909 wide-character and multibyte-character strings, in <wchar.h>;
3910 and classification and case conversion of wide characters, in <wctype.h>.
3911 These new functions are conforming to the ISO C, Amendement 1 specification.
3913 * There is now a second implementation of the standard I/O library available.
3914 It comes from GNU libg++ as was written by Per Bothner, heavily modified
3915 by Hongjiu Lu and made thread safe by Ulrich Drepper.
3917 * You can now use positional parameter specifications in format strings
3918 for the `printf' and `scanf' families of functions. For example,
3919 `printf ("Number %2$d, Mr %1$s\n", "Jones", 6);'' prints
3920 ``Number 6, Mr Jones''. This is mainly useful when providing different
3921 format strings for different languages, whose grammars may dictate
3922 different orderings of the values being printed. To support this
3923 feature, the interface for `register_printf_handler' has changed; see
3924 the header file <printf.h> for details.
3926 * The `printf' and `scanf' families of functions now understand a new
3927 formatting flag for numeric conversions: the ' flag (e.g. %'d or %'f) says
3928 to group numbers as indicated by the locale; for `scanf' and friends, this
3929 says to accept as valid only a number with all the proper grouping
3930 separators in the right places. In the default "C" locale, numbers are
3931 not grouped; but locales for specific countries will define the usual
3932 conventions (i.e. separate thousands with `,' in the US locale).
3934 * The pgrp functions have been regularized, slightly incompatibly but much
3935 less confusingly. The core functions are now `getpgid' and `setpgid',
3936 which take arguments for the PID to operate on; the POSIX.1 `getpgrp' (no
3937 argument) and BSD `setpgrp' (identical to `setpgid') functions are
3938 provided for compatibility. There is no longer an incompatible `getpgrp'
3939 with an argument declared under _BSD_SOURCE; no BSD code uses it.
3941 * The new header file <fts.h> and suite of functions simplify programs that
3942 operate on directory trees. This code comes from 4.4 BSD.
3944 * The resolver code has been updated from the BIND 4.9.5-P1 release.
3945 Parts of the code were heavily modified by Ulrich Drepper to fit in the
3946 NSS scheme used in glibc.
3948 * There is a new malloc debugging hook `__memalign_hook'.
3950 * There are new typedefs `ushort' for `unsigned short int' and `uint' for
3951 `unsigned int' in <sys/types.h>. These are for compatibility only and
3952 their use is discouraged.
3954 * The `-lmcheck' library to enable standard malloc debugging hooks is now
3955 done differently, so that it works even without GNU ld.
3957 * New function `euidaccess' checks allowed access to a file like `access',
3958 but using the effective IDs instead of the real IDs.
3960 * The time zone data files have been updated for the latest and greatest
3961 local time conventions of the countries of the world.
3963 * The new function `dirfd' extracts the file descriptor used by a DIR stream;
3966 * The new functions `ecvt', `fcvt', and `gcvt' provide an obsolete interface
3967 for formatting floating-point numbers. They are provided only for
3968 compatibility; new programs should use `sprintf' instead. There are
3969 also equivalent function for the `long double' floating-point type and
3970 all functions also exist in a reentrant form.
3972 * The new auxiliary library `-lutil' from 4.4 BSD contains various
3973 functions for maintaining the login-record files (primarily of use to
3974 system programs such as `login'), and convenient functions for
3975 allocating and initializing a pseudo-terminal (pty) device.
3977 * Ulrich Drepper has contributed new support for System V style
3978 shared memory and IPC on systems that support it.
3980 * Ulrich Drepper has contributed several miscellaneous new functions found
3981 in System V: The `hsearch' family of functions provide an effective
3982 implementation of hash tables; `a64l' and `l64a' provide a very simple
3983 binary to ASCII mapping; `drand48' and friends provide a 48-bit random
3986 * Ulrich Drepper has contributed new reentrant counterparts for the
3987 `random' and `hsearch' families of functions; `random_r', `hsearch_r', etc.
3989 * Ulrich Drepper has contributed new, highly-optimized versions of several
3990 string functions for the i486/Pentium family of processors.
3992 * Ulrich Drepper has updated the Linux-specific code, based largely
3993 on work done in Hongjiu Lu's version of GNU libc for Linux.
3994 The GNU library now supports Linux versions 2.0.10 and later,
3995 using the ELF object file format (i[3456]86-*-linux).
3997 * Andreas Schwab has ported the C library to Linux/m68k (m68k-*-linux).
3999 * David Mosberger-Tang and Richard Henderson have ported the C library
4000 to Linux/Alpha (alpha-*-linux). Richard Henderson contributed the
4001 dynamic linking support for ELF/Alpha.
4003 * Richard Henderson contributed several Alpha optimized assembler function
4004 for arithmetic and string handling.
4006 * Ulrich Drepper has contributed a new set of message catalog functions to
4007 support multiple languages using the <libintl.h> interface, for use with
4008 his new package GNU gettext. Translation volunteers have contributed
4009 catalogs of the library's messages in Spanish, German, and Korean.
4011 * For compatibility with XPG4, Ulrich Drepper has contributed the `gencat'
4012 program and the `catgets' function for reading the catalog files it
4013 creates. (The <libintl.h> interface is preferred; we include the
4014 <nl_types.h> interface using `catgets' only for source compatibility with
4015 programs already written to use it.)
4017 * New header file <values.h> gives SVID-compatible names for <limits.h>
4020 * Various new macros, declarations, and small header files for compatibility
4023 * New function `group_member' is a convenient way to check if a process has
4024 a given effective group ID.
4026 * When using GCC 2.7 and later, the socket functions are now declared in a
4027 special way so that passing an argument of type `struct sockaddr_in *',
4028 `struct sockaddr_ns *', or `struct sockaddr_un *' instead of the generic
4029 `struct sockaddr *' type, does not generate a type-clash warning.
4031 * New function `error' declared in header file <error.h> is a convenient
4032 function for printing error messages and optionally exiting; this is the
4033 canonical function used in GNU programs. The new functions `err', `warn',
4034 and friends in header file <err.h> are the canonical 4.4 BSD interface for
4035 doing the same thing.
4037 * The <glob.h> interface has several new flags from 4.4 BSD that extend the
4038 POSIX.2 `glob' function to do ~ and {...} expansion.
4040 * New function `unsetenv' complements `setenv' for compatibility with 4.4 BSD.
4041 `clearenv' which is used in POSIX.9 is also available.
4043 * New function `getsid' returns session ID number on systems that support it.
4045 * We have incorporated the 4.4 BSD `db' library (version 1.85). New header
4046 files <db.h> and <mpool.h> provide a rich set of functions for several
4047 types of simple databases stored in memory and in files, and <ndbm.h> is
4048 an old `ndbm'-compatible interface using the `db' functions. Link with
4049 `-ldb' to get these functions.
4051 * New macro `strdupa' copies a string like `strdup', but uses local stack
4052 space from `alloca' instead of dynamic heap space from `malloc'.
4054 * New function `strnlen' is like `strlen' but searches only a given maximum
4055 number of characters for the null terminator. `stpncpy', `strndup' and
4056 `strndupa' are similar variants for the `stpcpy', `strdup' and `strdupa'
4059 * New function `statfs' in header <sys/statfs.h>.
4061 * The new <argz.h> and <envz.h> interfaces contributed by Miles Bader
4062 provide convenient functions for operating on blocks of null-terminated
4065 * A new suite of functions in <utmp.h> handle all the details of reading
4066 and writing the utmp file.
4068 * An implementation of the NIS/YP(tm) based NSS service was contributed by
4071 * Paul Eggert and Ulrich Drepper modified the `strftime' function to be
4072 completely POSIX compliant and also implemented the extended functionality
4073 to handle alternate digit representation and alternate era date formats.
4075 * Ulrich Drepper provided an implementation of the `strptime' function
4076 defined in XPG4.2 which transforms a string into a `struct tm' value.
4078 * Paul Eggert provided the tzselect shell script as part of the timezone
4079 code. The shell script makes it easy to select the correct timezone
4082 * The implementation of the malloc family of functions is completely replaced
4083 by a new implementation by Doug Lea with many improvements by Wolfram Gloger.
4084 The implementation uses the mmap function (if available) and it is
4085 optimized for the use in multi threaded programs.
4087 * Ulrich Drepper contributed a MD5 "encryption" for the crypt family of
4088 functions. This new functionality is usable by specifying a special
4089 salt string and it is compatible with implementation on *BSD systems.
4091 * Lots of functions from the XPG4.2 standard were added by Ulrich Drepper:
4092 `getsubopt' to handle second level command line options, `bsd_signal'
4093 to access BSD style `signal' functionality, the obsolete `regexp' style
4096 * the `lchown' function is available on system which support this
4099 * The implementation of the shadow password handling function was contributed
4102 * David Mosberger-Tang changed the SunRPC implementation to be 64bit safe.
4104 * POSIX.1g support was added. The <sys/select.h> header is available,
4105 `isfdtype' and `pselect' are implemented. Craig Metz contributed an
4106 implementation of `getaddrinfo'.
4110 * For cross-compilation you should now set `BUILD_CC' instead of `HOST_CC'.
4112 * New header file <fstab.h> and new functions `getfsspec', `getfsent' and
4113 friends, for parsing /etc/fstab. This code comes from 4.4 BSD.
4115 * The new function `daemon' from 4.4 BSD is useful for server programs that
4116 want to put themselves in the background.
4118 * Joel Sherrill has contributed support for several standalone boards that
4119 run without an operating system.
4121 * `printf', `scanf' and friends now accept a `q' type modifier for long
4122 long int as well as `ll'. Formats using these might be `%qu' or `%lld'.
4124 * All of the code taken from BSD (notably most of the math and networking
4125 routines) has been updated from the BSD 4.4-Lite release.
4127 * The resolver code has been updated from the BIND-4.9.3-BETA9 release.
4129 * The new functions `getdomainname' and `setdomainname' fetch or change the
4130 YP/NIS domain name. These are system calls which exist on systems which
4133 * The time zone data files have been updated for the latest international
4136 * The SunRPC programs `portmap' and `rpcinfo' are now installed in
4137 $(sbindir) (usually /usr/local/sbin) instead of $(bindir).
4141 * The C library now includes support for Sun RPC, from Sun's free
4142 RPCSRC-4.0 distribution. The `portmap', `rpcinfo', and `rpcgen' programs
4143 are included. (There is still no support for YP.)
4145 * Tom Quinn has contributed a port of the C library to SGI machines running
4146 Irix 4 (mips-sgi-irix4).
4148 * The new `lockf' function is a simplified interface to the locking
4149 facilities of `fcntl', included for compatibility.
4151 * New time functions `timegm', `timelocal', and `dysize' for compatibility.
4153 * New header file <sys/timeb.h> and new function `ftime' for compatibility.
4155 * New header files <poll.h> and <sys/poll.h> and new function `poll' for
4158 * The error message printed by `assert' for a failed assertion now includes
4159 the name of the program (if using GNU ld) and the name of the calling
4160 function (with versions of GCC that support this).
4162 * The `psignal' function is now declared in <signal.h>, not <stdio.h>.
4164 * The library now includes the <sys/mman.h> header file and memory
4165 management functions `mmap', `munmap', `mprotect', `msync', and
4166 `madvise', on systems that support those facilities.
4168 * The interface for `mcheck' has changed slightly: the function called to
4169 abort the program when an allocation inconsistency is detected now takes
4170 an argument that indicates the type of failure. The new function
4171 `mprobe' lets you request a consistency check for a particular block at
4172 any time (checks are normally done only when you call `free' or `realloc'
4175 * It is now possible to easily cross-compile the C library, building on one
4176 system a library to run on another machine and/or operating system. All
4177 you need to do is set the variable `HOST_CC' in `configparms' to the
4178 native compiler for programs to run on the machine you are building on (a
4179 few generator programs are used on Unix systems); set `CC' to the
4182 * The new function `fexecve' (only implemented on the GNU system) executes
4183 a program file given a file descriptor already open on the file.
4187 * Brendan Kehoe has contributed most of a port to the DEC Alpha
4188 running OSF/1 (alpha-dec-osf1). He says it is 75% complete.
4190 * You can set the variable `libprefix' in `configparms' to specify a prefix
4191 to be prepended to installed library files; this makes it easy to install
4192 the GNU C library to be linked as `-lgnuc' or whatever.
4194 * The new `stpncpy' is a cross between `stpcpy' and `strncpy': It
4195 copies a limited number of characters from a string, and returns the
4196 address of the last character written.
4198 * You no longer need to check for whether the installed `stddef.h' is
4199 compatible with the GNU C library. configure now checks for you.
4201 * You can now define a per-stream `fileno' function to convert the
4202 stream's cookie into an integral file descriptor.
4204 * ``malloc (0)'' no longer returns a null pointer. Instead, it
4205 allocates zero bytes of storage, and returns a unique pointer which
4206 you can pass to `realloc' or `free'. The behavior is undefined if
4207 you dereference this pointer.
4209 * The C library now runs on Sony NEWS m68k machines running either
4210 NewsOS 3 or NewsOS 4.
4212 * The new `syscall' function is a system-dependent primitive function
4213 for invoking system calls. It has the canonical behavior on Unix
4214 systems, including unreliable return values for some calls (such as
4215 `pipe', `fork' and `getppid').
4217 * The error code `EWOULDBLOCK' is now obsolete; it is always defined
4218 to `EAGAIN', which is the preferred name. On systems whose kernels
4219 use two distinct codes, the C library now translates EWOULDBLOCK to
4220 EAGAIN in every system call function.
4224 * The GNU C Library Reference Manual is now distributed with the library.
4225 `make dvi' will produce a DVI file of the printed manual.
4226 `make info' will produce Info files that you can read on line using C-h i
4227 in Emacs or the `info' program.
4228 Please send comments on the manual to bug-glibc-manual@gnu.org.
4230 * The library now supports SVR4 on i386s (i386-unknown-sysv4).
4232 * Brendan Kehoe has contributed a port to Sun SPARCs running Solaris 2.
4234 * Jason Merrill has contributed a port to the Sequent Symmetry running
4235 Dynix version 3 (i386-sequent-dynix).
4237 * The library has been ported to i386s running SCO 3.2.4 (also known as SCO
4238 ODT 2.0; i386-unknown-sco3.2.4) or SCO 3.2 (i386-unknown-sco3.2).
4240 * New function `memory_warnings' lets you arrange to get warnings when
4241 malloc is running out of memory to allocate, like Emacs gives you.
4243 * The C library now contains the relocating allocator used in Emacs 19 for
4244 its editing buffers. This allocator (ralloc) minimizes allocation
4245 overhead and fragmentation by moving allocated regions around whenever it
4246 needs to. You always refer to a ralloc'd region with a "handle" (a
4247 pointer to a pointer--an object of type `void **').
4249 * There is a new `printf' format: `%m' gives you the string corresponding
4250 to the error code in `errno'.
4252 * In `scanf' formats, you can now use `%as' or `%a[' to do the normal `%s'
4253 or `%[' conversion, but instead of filling in a fixed-sized buffer you
4254 pass, the `a' modifier says to fill in a `char **' you pass with a
4257 * The `fnmatch' function supports the new flag bits `FNM_LEADING_DIR' and
4258 `FNM_CASEFOLD'. `FNM_LEADING_DIR' lets a pattern like `foo*' match a
4259 name like `foo/bar'. `FNM_CASEFOLD' says to ignore case in matching.
4261 * `mkstemp' is a traditional Unix function to atomically create and open a
4262 uniquely-named temporary file.
4266 * The standard location for the file that says what the local timezone is
4267 has changed again. It is now `/usr/local/etc/localtime' (or more
4268 precisely, `${prefix}/etc/localtime') rather than `/etc/localtime'.
4270 * The distribution no longer contains any files with names longer than 14
4273 * `struct ttyent' has two new flag bits: TTY_TRUSTED and TTY_CONSOLE.
4274 These are set by the new `trusted' and `console' keywords in `/etc/ttys'.
4276 * New functions `ttyslot' and `syslog' from 4.4 BSD.
4280 * The configuration process has changed quite a bit. The `configure'
4281 script is now used just like the configuration scripts for other GNU
4282 packages. The `sysdeps' directory hierarchy is much rearranged.
4283 The file `INSTALL' explains the new scheme in detail.
4285 * The header files no longer need to be processed into ANSI C and
4286 traditional C versions. There is just one set of files to install, and
4287 it will work with ANSI or old C compilers (including `gcc -traditional').
4289 * Brendan Kehoe and Ian Lance Taylor have ported the library to the
4290 MIPS DECStation running Ultrix 4.
4292 * The Sun 4 startup code (crt0) can now properly load SunOS 4 shared libraries.
4293 Tom Quinn contributed the initial code. The GNU C library can NOT yet be
4294 made itself into a shared library.
4296 * Yet further improved support for the i386, running 4.3 BSD-like systems
4297 (such as Mach 3 with the Unix single-server), or System V.
4299 * New function `strncasecmp' to do case-insensitive string comparison
4300 with limited length.
4302 * New function `strsep' is a reentrant alternative to `strtok'.
4304 * New functions `scandir' and `alphasort' for searching directories.
4306 * New function `setenv' is a better interface to `putenv'.
4308 * Ian Lance Taylor has contributed an implementation of the SVID `ftw'
4309 function for traversing a directory tree.
4311 * The GNU obstack package is now also part of the C library.
4312 The new function `open_obstack_stream' creates a stdio stream that
4313 writes onto an obstack; `obstack_printf' and `obstack_vprintf' do
4314 formatted output directly to an obstack.
4316 * Miscellaneous new functions: reboot, nice, sigaltstack (4.4 BSD only),
4317 cfmakeraw, getusershell, getpass, swab, getttyent, seteuid, setegid.
4319 * `FNM_FILE_NAME' is another name for `FNM_PATHNAME', used with `fnmatch'.
4321 * The new functions `strfry' and `memfrob' do mysterious and wonderful
4322 things to your strings.
4324 * There are some new test programs: test-fseek, testmb, and testrand.
4326 * Some work has been done to begin porting the library to 4.4 BSD and Linux.
4327 These ports are not finished, but are a good starting place for really
4328 supporting those systems.
4330 * `/etc/localtime' is now the standard location for the file that says what
4331 the local timezone is, rather than `/usr/local/lib/zoneinfo/localtime'.
4332 This follows the general principle that `/etc' is the place for all local
4333 configuration files.
4335 * The C library header files now use `extern "C"' when used by the C++
4336 compiler, so the C library should now work with C++ code.
4338 * The header file <bstring.h> is gone. <string.h> now declares bcopy,
4339 bcmp, bzero, and ffs. (Update: nowadays these functions are declared
4342 * Mike Haertel (of GNU e?grep and malloc fame) has written a new sorting
4343 function which uses the `merge sort' algorithm, and is said to be
4344 significantly faster than the old GNU `qsort' function. Merge sort is
4345 now the standard `qsort' function. The new algorithm can require a lot
4346 of temporary storage; so, the old sorting function is called when the
4347 required storage is not available.
4349 * The C library now includes Michael Glad's Ultra Fast Crypt, which
4350 provides the Unix `crypt' function, plus some other entry points.
4352 * The code and header files taken from 4.4 BSD have been updated with the
4353 latest files released from Berkeley.
4355 ----------------------------------------------------------------------
4356 Copyright information:
4358 Copyright (C) 1992-2018 Free Software Foundation, Inc.
4360 Permission is granted to anyone to make or distribute verbatim copies
4361 of this document as received, in any medium, provided that the
4362 copyright notice and this permission notice are preserved,
4363 thus giving the recipient permission to redistribute in turn.
4365 Permission is granted to distribute modified versions
4366 of this document, or of portions of it,
4367 under the above conditions, provided also that they
4368 carry prominent notices stating who last changed them.
4371 version-control: never